I've only skim over his letter.

我只是粗略地浏览了一下他的信。

The hovercraft is able to skim over the water.

气垫船能掠过水面飞速行驶。

Don't be content to just skim over courses with "only to pass".

不要只满足于对功课浅尝辄止，“只求及格”。

When I start to read a book, I always skim over the contents first.

我开始看一本书的时候总是先浏览一下目录。

When I start to read a book, I always skim over the contents first. ;

我开始看一本书的时候 总是先浏览一下目录。