Namely, we wait until the pendulum stops, and we measure the time until it stops again; that's half a period.

也就是，我们得到摆停，我们测量直到第二次停止的时间，那是半周期。

youdao

And then when it stops again, I'll stop the time, and then we have half a period.

当它再一次停下，我停止计时，那么我们将得到半周期。

youdao

This was somewhat surprising, since I am the youngest team member (I'm 27) and have been here for the shortest period of time (two and a half years).

这或多或少有些出人意料，因为我是团队中最年轻的一员(我今年只有27岁)，参加团队的时间也最短(只有两年半)。

youdao

The style of warfare that emerges in this period, apparently for the first time, is what we call the hoplite phalanx and each half of that needs to be explained.

显然,这个时期第一次出现了,一种独特的战争形式,那就是重步兵方阵,我来给大家分别解释下这两个词

耶鲁公开课 - 古希腊历史简介课程节选

Defender Craig Liddle had given Darlington the advantage at half-time after a frenetic opening period.

BBC: News Online

Was the student enrolled at least half-time for at least one academic period that began in 2012 at an eligible educational institution in a program leading towards a postsecondary degree, certificate, or other recognized postsecondary educational credential?

FORBES: Hundreds Of Thousands Of Taxpayers Thought To Be Impacted By Education Credit Snafu

Obviously a budget process we have had since we got here to cut the budget deficit in half over a four-year period of time.

WHITEHOUSE: Press Briefing