词典释义：
make or become flat or flatter
（使）变平；（使）变得更平
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[with obj.]
Martin flattened a book out in front of him 马丁在面前摊开一本书
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[no obj.]
after Kendal, the countryside begins to flatten out 过了肯德尔，乡野便开始平坦起来
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[as adj.
flattened ]they were dancing on the flattened grass .他们在整平的草地上翩然起舞。
[with obj. and adverbial of place]press (oneself or one's body) against a surface, typically to get away from something or someone or to let someone pass
（为避开或让路而）使（自己身体）平贴
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they flattened themselves on the pavement as a bomb came whistling down .随着一枚炸弹呼啸而下，他们全都趴在了人行道上。
[with obj.]
【乐】 使（音符）降半音。
[with obj.]raze (a building or settlement) to the ground
把（楼房，居住区）夷为平地
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the hurricane flattened thousands of homes .飓风把成千上万的家园夷为平地。
〈非正式〉 击倒，把（人）打趴在地
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Flynn flattened him with a single punch .弗林一拳把他打趴在地。
〈非正式〉 （尤指体育比赛中）彻底击败。
〈喻〉 羞辱，使蒙羞；使沮丧，使消沉
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the controversy has flattened everybody here, including the players .这场争论使这儿的每个人都非常沮丧，包括队员在内。
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flatten out 1 （of an increasing quantity or rate） show a less marked rise; slow down（上涨数量或速度）减缓 -
２ make an aircraft fly horizontally after a dive or climb （俯冲后）拉平飞机；（爬升后）改平飞机he flattened out and made a fine three-point landing . 他拉平飞机，来了一个精确的三点落地
