If something goes wrong—a hungry lizard prowling around for an ant snack, for instance—then a rush of ants returning without food sends waiting reserves a "Don't go out" signal.

如果出了什么问题——比如，一只饥饿的蜥蜴在四处寻找蚂蚁作为零食——那么一群没有食物的蚂蚁就会匆匆归来，给等待的蚂蚁发出“不要出去”的信号。

youdao

What we usually want is a work queue combined with a fixed group of worker threads, which USES wait and notify to signal waiting threads that new work has arrived.

我们通常想要的是同一组固定的工作线程相结合的工作队列，它使用wait和notify来通知等待线程新的工作已经到达了。

youdao

They've formed sleeper cells, just waiting for the signal to instigate a mass-recruitment at a moment's notice.

他们之前已经形成了睡眠者的细胞，只要等到信号，就会即刻进行大规模的招募。

youdao

They're ready to rapidly differentiate into antibody producing cells and they're waiting for that second signal to come.

并可以迅速分化为,抗体分泌细胞,记忆细胞在等待第二次信号的到来

耶鲁公开课 - 生物医学工程探索课程节选

In fact, they are all waiting for a brighter signal once again from the U.S., an alternative to this water torture of daily life that has become the EU and IMF dictated regime for recovery in Ireland, Spain, Greece, and the rest.

FORBES: New Irish Budget Reflects Struggle On Massive Debt

Finally, the signal everyone was waiting for.

NPR: Mars Rover Marks Second Anniversary of Landing

This was the signal that David Trimble has been waiting for and he saved the Executive from collapse by re-nominating his party's ministers.

BBC: NEWS | Programmes | BBC Parliament | When the assembly worked