The tests will be written in the normal class period.

测试是要在常规的课堂时间写出来。

麻省理工公开课 - 固态化学导论课程节选

But you will write during the normal class period.

但是你们要在常规的课堂时间做完。

麻省理工公开课 - 固态化学导论课程节选

If they're having a coronary artery bypass or they're having a heart transplant, then there's some period at which their normal heart - their heart is stopped and this machine assumes the functions of their heart.

病人在做冠状动脉搭桥手术,或者心脏移植手术时,病人自己的心脏,会停跳一段时间,而这台设备就能代替心脏工作

耶鲁公开课 - 生物医学工程探索课程节选