很有用

The computer is useful in processing data.

电子计算机在处理资料方面有用。

Her lectures are very useful, but they’re dry as dust.

她讲的课有用，可是却乏味得要死。

The book is valuable for my purpose.

这本书对有用。

A laptop would be really useful for when I’m working on the train.

在火车上工作时, 便携式电脑真的有用。

It pays to advertise.

登广告有用。

The distinctives of Reformed theology and practice are useful only to the degree that they undergird and clarify the gospel, the evangel.

革宗神学与实践的特点是有用的，但也只在一个程度上，即澄清福音与福音要点。

For example, Digital's Lectrice file format included a pre-rendered bitmap representation of each page to allow for quick page turns, a prerequisite for the thumbing navigation metaphor.

要回忆起停止阅读或者阅读上一次引用的地方，这种感受就变得有用了。