▲“优、良、中、差”的表示方法如下：

优: excellent

良: good

中: fair, average

差: poor

▲相关例句：

Films are rated on a scale of poor, fair, good and excellent.  影片被评为优、良、中、差四等。

Her written work is excellent but her practical work is only fair.  她的笔头功夫极佳，但实际动手能力却只是一般。

▲英语中有个习语，叫 fair to middling (=not very good but not bad)，意思是“马马虎虎，过得去”，这里的 fair 也就是“中等”的意意。如：

—What’s your French like?  你的法语怎么样？

—Oh, fair to middling. 哦，马马虎虎。