1. a couple o

三兩個…；一對…

eg. A couple of old women were chinning in the corner.

幾個老太婆在角落里聊天。

eg. Whereas if only I and a couple of other people like it, then it must be really something special.

然而，如果只有我自己和幾個別的什么人喜歡，那么它一定真的很特別了。

2. try on

試穿；試驗

eg. Can I try on this jacket?

我可以試穿這件夾克嗎？

eg. Sometimes they will try on a dozen or more pieces before deciding to buy a single outfit.

有時候，在購買一套衣服之前，她們會試穿一打甚至更多件衣服。

3. concentrate on

集中精力于；全神貫注于

eg. In doing so, businesses will be able to concentrate on what they know how do best: their business.

這樣，事情將能夠集中在他們知道如何做得最好的事情上：他們的業務。

eg. In this tutorial we concentrate on the results of compounding rather than the mathematics behind it.

在這份指南里我們集中在結果上而不后面的數學計算。