Finally, three functions are realized, they are the measurements of fluorescence lifetime, time-resolved spectrum and concentration of the detected solutions.

仪器实现三个功能，即荧光寿命、时间分辨光谱和被测溶液浓度的测量。

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Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

So we may live, in your lifetime, to a time when this burden of Southern history may get all but lifted altogether from Southerners, unless we don't forget the Civil War.

也许我们,在有生之年,不会看到这段历史给南方造成的阴影,完全消散,除非我们将内战遗忘

耶鲁公开课 - 美国内战与重建课程节选

Debuting at the same time as "super storm" Hurricane Sandy, the Livestream android app offers a new way for users to share their experience of a once in a lifetime event in real time with their social networks.

ENGADGET: Livestream for Producers Android app update brings live video broadcasts over wireless data connections

Time limits on lifetime welfare benefits -- five years -- and on finding work -- two years.

CNN: D.C. Brigadoon -- Applaud It While It Lasts!

Joan Herbig got the promotion of a lifetime at the worst possible time.

FORBES: Survivor