Their design is an eye-sore to me.

　　他们的设计真让人看不下去。

　　an eye-sore 字面意思是：“眼睛疼痛”，引申为令眼睛疼痛的事物，即刺眼的东西。所以这个短语的正确意思是：“让人看不顺眼的东西，看不下去的东西”。因此，当美国人说"Their design is an eye-sore to me."时，他/她要表达的意思就是:"Their design sucks."、"Their design is terrible and I don't want to have a look at it."。

　　情景对白：

　　Alice: Sir, here is the design paper from the decoration company.

　　爱丽丝：老板，这是装饰公司的设计图纸。

　　Boss: Oh, my God! Their design is an eye-sore to me.

　　老板：天啊，他们的设计真让人看不下去。

　　搭配句积累：

　　①I have never seen such a stupid design.

　　我还从来没见过这么愚蠢的设计呢。

　　②Have you made them understand our requirements?

　　你传达清楚我们的要求了吗？

　　③Is this the design that they are proud of?

　　这就是他们引以为豪的设计吗？

　　④I won't choose that design team.

　　我不会选择那个设计团队的。