But once inside the event horizon (the surface of a black hole) it is never possible to communicate with the outside.

但是，一旦进入视界(黑洞的表面)，就绝无可能与外界交流了。

youdao

In spite of this, once inside the bus he cannot resist the temptation to light up a cheap, heavy cigar that clogs up his windpipe and makes him cough.

尽管如此，一旦在公交车内，他就会忍不住要点燃一支便宜的大雪茄，虽然那会阻塞他的气管，让他咳嗽。

youdao

Trudging through Boston's sub-zero winters with layers of clothing -- only later to remove those layers once inside warm classrooms -- irked Vistakula.

穿着厚厚几层的衣服在波士顿零度以下的寒冬中艰难行走—到了温暖的教室以后又得马上脱下这些外套，Vistakula.对此感到无比厌烦。

youdao

Once inside, the cow is rewarded with food.

VOA: special.2009.05.12

It ultimately evaluates that line of code but just once the stuff inside the curly braces, but the semicolon on the end, essentially has the effect of this.

它最终执行了那行代码,但是只有一次，当那个东西在花括号里，分号放在后面，本质上影响了这个循环。

哈佛公开课 - 计算机科学课程节选

You can kind of see where the syntax is going, looks like a loop, but you can kind of put blocks inside of you, and the little arrow suggests that once you get to the bottom just like our socks example, you're gonna do the following again.

从某种程度上你可以看到它的语法构成,像个循环，你也可以把，一些程序块放到循环中，如同短袜的例子，这个小箭头暗示你一旦到达底部,你将会重复接下来的事情。

哈佛公开课 - 计算机科学课程节选

Once inside, staff members train the visitors on how to safely interact with the animals.

BBC: Play one-on-one with a giant panda

Once inside, the son noticed the downstairs had been disturbed and called police, Brown said.

WSJ: Arrest made in case of double slaying at NY home

Once inside the office Mr Abdel-Fattah tweeted that he had refused to answer Mr Abdullah's questions.

BBC: Egypt blogger Alaa Abdel-Fattah questioned over clashes