反衬的英文：
serve as a foil to

参考例句：

Set off; let off;took off
使爆炸;燃放;发射;出发;反衬

An ugly woman serves as a foil to a pretty girl.
一个丑女人可以将美丽的姑娘反衬得更加漂亮。

serve是什么意思：
v. 为...服务；供应；任（职）；服役
n. 发球（权）

to serve the landlord
为地主干活

Persons serving on the Appellate Body shall serve in rotation.
上诉机构人员任职应实行轮换。

They drafted him to serve as their delegate.
他们选派他作他们的代表。

Dinner was announced, and served.
已宣布开饭了，菜都上齐了。

Catharine served an ace.
凯瑟琳发球得分。

foil是什么意思：
n. 箔，金属薄片；烘托
v. 衬托；挫败

The conspirators will be foiled in their intrigue.
阴谋家的阴谋将被挫败。

To coat(glass, for example)with metal foil.
以箔包用金属箔覆盖（如玻璃）

Chocolate is wrapped in foil to keep it fresh.
为保新鲜，巧克力用箔纸包起来。

Their attempt to recapture the city is foiled by a traitor.
他们重新夺回这座城市的企图被叛徒打破了。

We foiled his attempt to escape.
我们挫败了他逃跑的企图。