head wave [地震] 首波 ; 头波
s-head wave 横波首波
Head wave track 首波跟踪
seismic head wave 地震首波
head wave velocity 首波速度
acoustic head wave 声波首波
head wave detection 首波检测
head wave amplitude 首波波幅
head wave traveltime 首波走时
Caterpillars move by a wave that starts at the back end of their body and sweeps through each segment until it reaches the head, pushing it forward.
毛毛虫移动时的每一波都是从身体的后段开始,然后这个波穿过身体的每一部分,一直到达头部,进而将整个身体向前移动。
But with the tsunamis that head out to sea, some of the energy dissipates as the wave spreads outward across open ocean, like a ripple from a rock thrown into a pond.
但当海啸向海域进发,随着波浪向远洋扩散,能量也会逐渐消耗,这跟将一颗石块扔进池塘所引发的波纹是一样的道理。
To this day, we wave to each other every time we head off in different directions.
直到今天,每次当我们前往不同的方向,我们总会相互挥手。
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