已经开始60秒倒数了！

THE 60 SECOND COUNT DOWN HAS BEGUN!

youdao

基本上我总是设定30分钟的倒数计时，大约20秒的闹铃。

I keep the timer set for 30 minutes, and the alarm beeps for 20 seconds when it goes off.

youdao

倒数计时的数字表定格在7分56秒。工程技术人员决定推迟发射。

Then, at seven minutes and 56 seconds, the digital clock froze because technicians decided not to proceed.

youdao

The one thing you want to keep in mind though is that Hertz does not actually mean inverse seconds, it means cycles per second. So, if you're talking about a car going so many meters per second, you can't say it's going meter Hertz, you have to say meters per second.

写成5每秒，或5赫兹,你们要记住的是赫兹,并不等于秒的倒数，它是每秒的循环数，如果你们说,一辆车一秒可以走多少米,你不能说它走了米赫兹。

麻省理工公开课 - 化学原理课程节选

I'm about to count to three.

我就要倒数三秒了。

I'm about to 实战 - SpeakingMax英语口语达人

So, sometimes you'll find the Rydberg constant in different forms, but just make sure you pay attention to units because then you won't mess them up, because this is in inverse seconds here, the other Rydberg constant is in joules, so you'll be able to use what you need depending on how you're using that constant.

有时候你们会发现Rydberg常数,会写成不同的形式，但你们要注意,它的单位就不会弄错了，因为这里是秒的倒数，而另一个Rydberg常数是焦耳，所有你可以根据你要怎么使用,这个常数来选择你需要的常数。

麻省理工公开课 - 化学原理课程节选