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60秒科學(xué):氣泡也繁殖,大泡變小泡(有聲)

時(shí)間:2010-06-10 16:23:23 來源:scientificamerican 編輯:francie 每天三分鐘英語輕松學(xué)

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【詞匯解釋】

1..shard n. 碎片，薄硬殼

2.rupture n. 破裂，斷裂 v. 使破裂

He'll rupture a muscle if he goes on dancing like that!
他要是繼續(xù)那樣跳舞，會跳得皮開肉裂！

He ruptured himself lifting a bookcase.
他抬書柜時(shí)出現(xiàn)了疝。

3.retract v. 縮回，收回，否認(rèn)，撤銷

The accused refused to retract (his statement).
那被告拒不撤消(其供述).

The undercarriage on light aircraft does not always retract in flight.
輕型飛機(jī)飛行時(shí)起落架不一定縮回。

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