我可以在网上搜索有用的信息。

I can search useful information online.

我可以在广播节目中听取有用信息。

I can listen for useful information in a radio program.

雨和在门口可能会给你有用的信息。

Rain and in the doorway might give you helpful information.

当他们发现他们的主管有用时。

When they find their supervisors helpful.

烟雾报警器只有在正常工作时才有用。

A smoke alarm is only good if it's working properly.

这本书很薄，却包含各种有用的信息。

It's a thin book and has all kinds of useful information.

众所周知，计算机非常有用。

As we know, computers are very useful.

这就是为什么吹口哨对当地人如此有用。

That is why whistling is so useful to the local people.

一个专业的作家会给你更多有用的建议。

A professional writer will give you more useful suggestions.

例行公事在帮助你完成事情方面非常有用。

Routines can be incredibly useful in helping you get things done.