"When we do a knee replacement, we remove one or sometimes both of the cruciate ligaments - which are the ligaments in the center of the knee.

VOA: standard.2010.08.11

Sometimes we might just directly tell you that's probably the easiest scenario, because when we think about work functions those are usually reported in energy.

有时候我们可能只是直接告诉你,那可能是最简单的情况，因为当我们考虑功函数时,它们经常用能量来记录。

麻省理工公开课 - 化学原理课程节选

Sometimes when correspondence is saved you run into these kinds of problems, so we have to guess a little bit at what she was looking at.

有时即使资料的确存在,可找不到麻烦就来了，因而，我只能去猜测她的大意了。

耶鲁公开课 - 1945年后的美国小说课程节选

When we transfer both,one hemisphere might work sometimes, sometimes the other hemisphere,but never both.

当两半大脑移植时，有时半边能用，有时另外半边能用，但从不能同时。

耶鲁公开课 - 死亡课程节选

Or, especially when talking about estimates of the variance, we sometimes say S2 or we say standard deviation2.

又或者,在讨论方差估计的时候,我们常用S2,称为标准差的平方

耶鲁公开课 - 金融市场课程节选