Our teacher said that it was time to study.

我们老师说学习的时间到了。

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Sheng thought it was time to study the same things using human embryonic stem cells.

沈认为，应该是时候使用人类干细胞研究相同的事情了。

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It was around this time that Boston University bioengineer James Collins saw his chance to inject a little engineering know-how into the study of biology.

就在这个时期，波士顿大学的生物工程师James Collins看到了机会，他把一些工程学的技术知识运用到生物学的研究当中。

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Although these still-sealed documents apparently contain nothing to contradict McVeigh's boastful confessions, it was widely assumed that his lawyers would be granted more time to study them.

ECONOMIST: Timothy McVeigh��s execution

Although it was largely ignored at the time, that study led to the 1988 Welfare Reform Act, which for the first time recognised a father's duty to support his children (and a mother's responsibility to find a job).

ECONOMIST: The incomparable Daniel Patrick

There was a long lag between the time the study was finished (July 2006, according to clinicialtrials.gov) and when it was released.

FORBES: Magazine Article