放冲的英文：
scour prevention

scour是什么意思：
v. 刷净，擦亮，冲刷成，擦掉，搜寻
n. 擦，冲刷，洗涤剂

Please scour the pots and pans.
请把壶和锅刷干净。

You can scour dirty pans by rubbing them with scouring powder.
用去污粉可以把脏盘子擦净。

The detective scoured the scene of the crime for clues.
那个侦探在犯罪现场仔细搜索线索

scour out a saucepan,ie with a scourer
擦亮长柄锅

Police scoured the woods looking for the body.
警方到树林各处寻找那具尸体。

prevention是什么意思：
n. 预防，防止；阻止，妨碍；预防方法；预防药

To neutralize a city to prevent bombing.
宣布某城市中立以避免被轰炸。

Prevention is better than cure
预防胜于治疗

This has proved an effective preventive.
这种药证明是很有效的预防剂。

Try to prevent an escalation of the war.
竭力防止战争升级。

These methods prevent pregnancy.
这些方法能防止怀孕。