注解：look 是“看”，查找东西当然要用眼睛看着才能查找得到。

例句：Looking up words in a paper dictionary helps with its memorization.

查纸制字典可以帮助单词的记忆。

410. loony bin – insane asylum. 疯人院（贬义）

注解：loony 是名词“怪人，疯子”，bin是“箱子，容器”。字面理解“装疯子的容器” 就是疯人院了。如果要保持中立得形容神经病院，可以说 Mental institution.

例句：I couldn’t believe how crazy she acted last night. She belongs in the loony bin!

昨晚她简直是疯了！她必须被送去疯人院！

411. lose face – to lose reputation, to be humiliated. 丢脸

注解：lose是“丢”，face是“脸”。

例句：China have lost face by agreeing to the Treaty of Nanking.

清政府签署南京条约丢了中国的脸。

412. lose one’s marbles – go insane, act irrationally. 疯了

注解：marbles 是弹珠的意思，弹珠是对小孩来说十分重要不可丢失的重要玩具，丢了弹珠小孩子就要发疯了。

例句：Anyone who insults his boss has lost his marbles.

敢骂老板的人一定是疯了。

413. lose one’s shirt – lose all one’s money. 输光了

注解：字面理解“输了衬衫”，就是输得连衬衣都拿来抵债。

例句：He put his lifetime savings into the restaurant. When it failed, he lost his shirt.

他把全部的积蓄都投进餐馆里了。餐馆一亏本他自己也一分钱都不剩。

414. lose track of someone – lose contact, no know where someone is. 失去联系

注解：to track someone 就是跟踪某人，寻找某人，track 有追踪的意思。如果失去追踪，就是找不到了，这里可以说是失去联系。有时候可以认为是失去踪迹，比如侦探追踪不到犯人，导弹追踪不到目标等。一个很常用的用法是Lose track of time, 失去时间概念。 He lost track of time and is about to be late. 他没注意时间，马上就要迟到了。

例句：I have lost track of him since high school and have no idea where he lives now.

从高中以来我就和他失去了联系。

415. louse up – ruin. 毁掉

注解：louse 是“虱子”，床上要到处是虱子，多好的夜晚也会被毁掉的，因为它会咬得你睡不着觉。

例句：I’ve worked on this painting for weeks, but when my paintbrush slipped out of my hand, I loused up the painting.

我在这幅画上已经投入和几个星期的时间，但是我手一滑，就毁了这么好一幅画。

416. lowdown – the true story. 内情，实情

注解：给领导看的肯定是高大上的，不看那些就是要看实情。

例句：I heard that she was married before but didn’t know why she divorced. Give me the lowdown.

我听说他结过婚，但是不知道她是离婚的。具体怎么回事给我讲讲。

417. lower the boom – stop completely, punish strictly. 严厉惩罚

注解：low是低的意思，后面加上er, 变成lower, 就是动词，是降低、放低的意思。 lower the boom里的boom是一个帆船上的专业术语，指的是张帆杆，又叫下桁。降下张帆杆，就是要对某人进行严厉惩罚了。

例句：When the father heard that the children were not doing their homework, he lowered the boom.

当父亲听说孩子们没有在做他们的作业，他实施了严厉的惩罚。

418. make a bundle – make a lot of money. 挣了不少钱

注解：bundle 是一把，这里就是指一把钱，一万美金左右。

例句：She made a bundle selling donuts to the construction workers.

她靠卖甜甜圈给工地工人赚了一笔。