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60秒科学:气泡也繁殖,大泡变小泡(有声)

时间:2010-06-10 16:23:23 来源:scientificamerican 编辑:francie  每天三分钟英语轻松学

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【词汇解释】

1..shard   n. 碎片,薄硬壳

2.rupture   n. 破裂,断裂  v. 使破裂

He'll rupture a muscle if he goes on dancing like that!
他要是继续那样跳舞,会跳得皮开肉裂!

He ruptured himself lifting a bookcase.
他抬书柜时出现了疝。

3.retract   v. 缩回,收回,否认,撤销

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.
轻型飞机飞行时起落架不一定缩回。

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