Therefore, the wave equation pre-stack depth migration, a method starting directly from the rolling surface, is discussed.

为此，探讨了直接从起伏地表开始的波动方程叠前深度偏移方法。

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As chemical precursors stream onto the surface of a rolling metal or plastic substrate, they react with one another to form a network of nanoparticles.

各化学母质流向滚动中的金属或塑料基片的表面，他们互相作用，形成一层纳米级微粒网状结构。

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The new moon that appeared in late April started the ball rolling in your career, so you should continue following up on any career offers that surface.

上个月下旬的满月使得你的职业生涯出现了一些折腾，所以你应该继续跟进任何和职业有关的状况。

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"Given the subtle slopes of the greens, don't be surprised if you see putts rolling off the putting surface should the wind get up, " he said.

BBC: THE LOWDOWN