cover/discover/discovery/discoverer/uncover/expose/betray/detect/detective/recover/lid
记忆：
1. cover [ 5kQvE ] n. 盖子, 封面 vt. 覆盖，报道 What do you think of the phenomenon that beautiful women take up nearly all magazine covers? 美女几乎占据了所有的杂志封面，你对这一现象怎么看？ 格言：You can't tell a book by its cover. 不能以貌取人。
2. discover [ dis5kQvE] vt. 发现, 发觉 Some people doubt whether it is Columbus who first discovered America.一些人怀疑是不是由哥伦布首先发现美洲的。
3. discovery [ dis5kQvEri] n. 发现 His discovery resulted in a industrial revolution.他的发现引起了一场工业革命。
4. discoverer [ dis5kQvErE] n. 发现者 Who was the discoverer of Radium?谁是镭的发现者？
5. uncover [ Qn5kQvE ] vt.揭开, 揭露 Uncovering the basket, she was moved to find her favorite fish there.她揭开篮子，发现里面是她最爱吃的鱼，很受感动。
6. recover [ ri5kQvE ] re-cover vi. 痊愈, 复原 I hope you can recover soon.我希望你很快康复。
7. expose [ iks5pEuz ] 词根pose表示“放”；ex-, 外；expose, 放在外面，vt.使暴露, 使曝光 As a reporter, I think it’s my duty to expose the scandal and praise the kindness.作为记者，我认为我有责任扬善惩恶。
8. betray [ bi5trei] be-tray vt.出卖, 背叛, 泄露 When you betray your motherland, you are not worthy of being human.如果你背叛祖国，你就不是人。
9. detect [ di5tekt ]　 词根tect含义是“遮蔽，掩盖”;前缀de-含义为“反，去”，detect, 去掉遮掩，探测，侦探 In my childhood, I dreamed that I could invent some equipment to detect mushrooms in the wild.童年时候，我梦想我能发明一种设备来探测野外的蘑菇。
10. detective [ di5tektiv ] n. 侦探 Holms is the best-known detective. However, he was not a real man.福尔摩斯是最有名的侦探，但他却非真人。
11. protect [ prE5tekt] 前缀pro-为“先”，事先遮盖起来，保护 Everyone should form the sense of protecting life, no matter whose it is.每个人都应有保护生命的意识，不论那是谁的生命。
12. lid [ lid ] n. 盖子 Sorry, but the lid refuses to be removed. 对不起，但盖子挪不动。
另类阅读：
Uncovering the jar by removing the lid, the farmer discovered something with strange smell. He soon recovered from his poor health.