当前时间，12小时制，时时：分分：秒秒

T : the current time in 12-hour HH:MM:SS format

youdao

当前时间，24小时制，时时：分分：秒秒。

T: the current time in 24-hour HH: MM: SS format.

youdao

一个个日子组成了岁月，一秒秒时间走老了人生。

A one day form the years, the second time, seconds away old life.

youdao

So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.

如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。

麻省理工公开课 - 化学原理课程节选

You have a whole bunch of runners and five of them have all run it in under 15 seconds.

你有许多跑步选手,其中五个都在15，秒内跑完了。

麻省理工公开课 - 固态化学导论课程节选

If it takes you 1 / 60 of a second to go around once, then you do it 60 times a second.

如果转一圈要 1 / 60 秒,那么一秒就转了60圈

耶鲁公开课 - 基础物理课程节选