down-stroke
基本释义
下行冲程
实用场景例句
学术讨论
The laser beam measured the particle size accurately.
激光束精确测量了粒子大小。
校园生活
Her smile beamed with happiness as she won the award.
她获奖时脸上洋溢着幸福的笑容。
社会场景
The sun beamed down on the beach all day.
阳光全天照耀海滩。
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