您要查找的是不是：
- That maths exam I took was a regular brain drain. 绞尽脑汁的数学测验，我真是绞尽了脑汁。
- He wore a mask so that no one should recognize him. 他戴了一个面罩，使别人认不出他来。
- Pull (out) the plug and let the water drain away. 拔掉塞子，把水放掉。
- They are digging trenches to drain the water off. 他们正在掘沟排水。
- They are digging trenches to drain the water away. 他们正在掘沟排水。
- Capable of masking or neutralizing odors. 可除臭的可以掩臭或中和臭气的
- The coffee grains plugged up the kitchen drain. 咖啡渣堵塞了厨房的排水道。
- The drain is blocked and needs unplugging. 排水管堵塞了，得疏通一下。
- The bathtub drain needs repairing. 浴盆的排水管需要修理。
- Sham is sham and the mask must be stripped off. 假的就是假的，伪装应当剥去。
- All hands turned out to repair the terraces and drain the water. 所有劳动力都出来整修梯田，排除积水。
- He tried to mask his disappointment with a smile. 他试图以微笑来掩饰他的失望。
- The mask fitted tightly over his face. 他用面具把脸蒙得严严的。
- They did so under the mask of charity. 他们是打着慈善的幌子这么做的。
- All of our best laid plans are down the drain. 我们所有精心布置的计划都付之东流
- drain masking 漏掩蔽
- A sewer or drain crossing under a road or embankment. 涵洞横在公路或堤岸下面的下水道或排水管
- If you leave college, all that money has gone down the drain! 你要是中断大学的学习，你花的钱就会都付诸东流了。
- Such feelings tend to remain submerge beneath a mask of social politeness. 在社交礼貌的掩盖下，这样的情感往往不会显露出来。
- Military spending is a huge drain on the country's resources. 军费开支是国家资源的一大消耗。
