since

英[sɪns]美[sɪns]

prep.自…以后，何曾；

conj.自从，因为，既然；

adv.后来；

英语六级真题

Since there were few museums anywhere in Europe before the close of the eighteenth century, Grand Tourists often saw paintings and sculptures by gaining admission to private collections, and many were eager to acquire examples of Greco-Roman and Italian art for their own collections.

Oil prices have dropped by over 60% since June 2014.

At this time there is nothing to take action on since the analysis has yet to be completed.

And the reality is that antibiotics have been responsible for saving millions of lives since penicillin, one of the earliest antibiotics, was first used on a clinical basis 70 years ago.

According to a new study, the number of advertisements with green messages in mainstream magazines has risen since 1987, and peaked in 2008 at 10.

Yong Yu, a Chinese microbiologist, showed off the spacious building, with empty desks under an illustrated timeline detailing the rapid growth of China's Antarctic operations since the 1980s.

This approach has led over time to a fall in smoking with numbers having roughly halved since the 1970s.

Since tobacco is one of the biggest causes of premature death in the UK, a measure that tames the habit even by a fraction is worth trying.

More than a century has passed since explorers raced to plant their flags at the bottom of the world, and for decades to come this continent is supposed to be protected as a scientific preserve, shielded from intrusions like military activities and mining.

His attitude to state intervention has looked confused ever since his bizarre 2006 lament ( ' , 叹惜) that chocolate oranges placed seductively at supermarket checkouts fueled obesity.

As if that were not enough, a Brazilian C-130 Hercules military transport plane has remained stranded near the runway of Chile's air base here since it crash-landed in 2014.

The team focused on athletes since they are theoretically the best role models for active, healthy lifestyles for children.

Just half a dozen holiday-makers have reached orbit since then, for similarly astronomical price tags.

According to a new study, the number of advertisements with green messages in mainstream magazines has risen since 1987, and peaked in 2008 at 10.4%.

After all worlds, workers have already suffered the worst deduction in wages since the early 18 hundreds.

All this conversion has helped Maple hill grow 40-50% every year since it began with no end in sight.

And since we've moved to this new shop, the expenses have increased greatly because it's a much bigger shop.

Best Buy, for instance, has been bearing the lion's share of e-waste volume since two of its largest competitors, Amazon and Wal-mart, do not have their own recycling programs.

But the status quo can be problematic, since a change in the course of action can sometimes be important and lead to a positive outcome.

Cambridge scientist Peter Wadhams who's been measuring and monitoring the Arctic since 1971, says the decline is irreversible.

Especially since journalism is one job robots will never do.

Ever since humanity began to farm our own food, we've faced the unpredictable rain that is both friend and enemy.

In Brazil, multinational corporation Adidas has been running a shoe-recycling program called "Sustainable Footprint" since 2012.

Joseph's top priority became getting his hands on enough grass-fed milk to keep customers satisfied, since his own 64-cow herd wasn't going to suffice.

More than a century has passed since explorers raced to plant their flags at the bottom of the world, and for decades to come this continent is supposed to be protected as a scientific preserve, shielded from intrusions like military activities and mining

oil prices have dropped by over 60% since June 2014.

Sales of Barbie dolls have been falling every year since 2012, according to CBC news.

Saturated fats are used by the body to make cholesterol, and high levels of cholesterol have since been directly related to heart disease.

since 2010, more than 24 shopping malls have closed and an additional 60 are struggling.

since 2010, the couple has helped 125 small dairy farms convert to grass-fed, with more than 80% of those farms coming on board during the last two years.

since 2013, global scientific bodies have begun to back policies that support increased public access to research.

since he began to informally announce the network at farming conferences and on social media, he's received a steady stream of inquiries from interested farmers.

since it's a government-operated institution, things don't move very fast.

since its beginning, the program has now grown, and has 21 therapy dogs and a therapy cat.

since the former is most common among those inclined towards indifferent relationships, their predominance can bolster individuals' sense of self-worth.

since the launch of its program, Best Buy changed its policy to add a $25 fee for recycling old televisions in order to keep the program going.

since the middle of the 20th century, though, things have turned the opposite way—these days, punishing hours at your desk, rather than days off, are seen as the mark of someone important.

since then, NASA, the National Reconnaissance Office and even Boeing have all launched and operated CubeSats.

since there were few museums anywhere in Europe before the close of the eighteenth century, Grand Tourists often saw paintings and sculptures by gaining admission to private collections, and many were eager to acquire examples of Greco- Roman and Italian

since these services rely on advertising revenue, the more frequently you use them, the more money they make.

These scenes are turning up in the southern French city of Arles, surprising the historians who have been working here since 2014.

Vegans can benefit from protein supplements since they do not eat animal-based protein sources like meat, dairy or eggs.

柯林斯高阶英汉双解学习词典释义

PREP

(表示某情况自过去某时间点或某个事件以来一直持续到现在)自…以后，从…以来

You use since when you are mentioning a time or event in the past and indicating that a situation has continued from then until now.

例句

PREP

(表示某事件或情况从过去某时间或某个事件之后一直发生)自…以来,在…之后

You use since to mention a time or event in the past when you are describing an event or situation that has happened after that time.

例句

ADV

(表示过去某事或某情况发生后不久又发生了另一件事)此后，后来

When you are talking about an event or situation in the past, you use since to indicate that another event happened at some point later in time.

例句

PHRASE

早就

If you say that something has long since happened, you mean that it happened a long time ago.

例句

CONJ-SUBORD

因为;由于;既然

You use since to introduce reasons or explanations.

例句

英汉词典释义

prep.

(表示时间)从…以来; 自从…之后

adv.

从过去某时间以来[以后, 到现在]

conj.

自从(过去某事)以来[以后, 到现在]

因为; 既然; 由于