He had a row with his wife and just ________________________________ (把她抛弃了). (walk out on)
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I suggest that you tear up the composition and start ______ again.
当两个参考系的相对运动速度远小于光速时,可用伽利略变换代替洛伦兹变换
“和平号”空间站每个舱都有独立的电源与控制系统,增加了空间站的可靠性。
当波传播时,质元并没有被传播,而是振动状态在传播.