at a fast/good clip怎么读，是什么意思，单词翻译、读音

We set off at a good clip, but we gradually slowed down. 我们出发时速度很快，可是后来渐渐慢了下来。

Government investment in research has been increasing at a fast clip.

The action proceeds at a fast clip, with all the main characters introduced in the first five minutes.

Even the commuter trains move at a good clip.

The cattle headed up the hill at a good clip.