柯林斯英汉双解大词典
elapse /ɪˈlæps/ CET6 TEM4 ( elapsing, elapsed, elapses )
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1.
V-I When time elapses, it passes. (时间) 流逝 [正式]
例：Forty-eight hours have elapsed since his arrest.
他被捕后48小时已经过去了。
双语例句原声例句权威例句
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Forty-eight hours have elapsed since his arrest.
他被捕后48小时已经过去了。
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Many years elapsed before they met again.
过了许多年他们才再次相见。
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Five years have elapsed in a flash.
一晃就是5年。
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Alright. So, since we have these terms defined, we know the frequency and the wavelength, it turns out we can also think about the speed of the wave, and specifically of a light wave, and speed and is just equal to the distance that's traveled divided by the time the elapsed.
好了，我们已经定义了，这些术语，我们知道了，频率和波长，现在可以来考虑,波的速度了，特别是光波的速度，速度等于它走过的距离,除以所用的时间，因为我们。
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The period, that's right. So, it's going to take one period to move that long. And another way 1 we can say period is just 1 over nu or 1 over the frequency So, now we know both the distance traveled and the time the elapsed.
还是？周期，对的,它需要一个周期的时间,另一种说法是周期是,除以nu，也就是1除以频率,现在我们同时知道了。
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So, we can just plug it in. Speed is equal to the distance traveled, which is lambda over the time elapsed, which is 1 over nu. so, we can re-write that as speed is equal to lambda nu times nu, and it turns out typically this is reported in meters per second or nanometers per second.
经过的距离和所花的时间,我们把它们带进来,速度等于经过的距离,也即是lambda除以,所花的时间,通常它的单位,是米每秒或者纳米每秒。
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