These classes decide when they need to fire events, and when they do, they call all the listeners that are registered.

这些类负责决定什么时候它们需要触发事件，什么时候确实触发事件，以及什么时候调用所有登记的侦听器。

youdao

That is not the case with, say, mobile phones, in which the telecom operator can tell which phone placed what call and to whom the phone is registered.

而这与，比如说移动电话的情况不同，电信运营商能知道谁注册的哪个手机打了哪个电话。

youdao

Instead, it copies only the events that are newly registered after the previous select call.

相反，它只复制在前一次select调用之后新注册的事件。

youdao

More than 350, 000 students across 183 countries heeded the call and registered to participate.

WHITEHOUSE: Office of Science and Technology Policy Blog

The volunteer got on the phone, registered the question with the call center, and gave the man the answer he wanted.

FORBES: Magazine Article

This is a matter near to my heart, because I am confronted with four or five Spam calls every evening on my home phone, which is registered on the Do Not Call list.

FORBES: FTC Awards 'Robocall Challenge' Winners