The director told her when to go onstage.

导演告诉她什么时候上场。

When to be warm, I like to go to the beach.

天气热的时候，我喜欢去海边。

When to go camping depends on the weather.

什么时候去露营要看天气而定。

An actor's call tells him when to go on stage.

有个演员示意让他到时上场。

Traffic lights tell us when to go and when to stop.

交通灯告诉我们什么时候走，什么时候停。

Earth that tells us when to go to bed and when to get up.

是地球的自转告诉我们什么时候去睡觉，什么时候该起床

The system should be smart enough to know when to charge and still ensure a car is ready to go when a driver specifies.

该系统应该足够聪明，知道什么时候收费，仍确保一车准备去当一名司机指定。

When to want to go to Shanghai once again, have gone to solve the problem of specialized course.

什么时候要再去上海一趟，去把专业课的问题解决了。

When to go: Thanks to its idyllic tropical setting, Hawaii is a popular destination year-round.

何时去：由于它有着田园诗般的热带风情，夏威夷是一个全年都热门的目的。

When to Go: Mianyang is favorable for visiting all the year round, especially in May and October.

最佳时机：绵阳整年都很适合旅游，5月和10月尤佳。