Of course, in certain circumstances, a simple wave, nod or smile may be appropriate.

当然，在某些情况下，简单的挥手、点头或微笑可能都是合适的。

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The underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations.

基本的方法是以双曲型偏微分方程组的简单波解为根据的。

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The underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations.

复杂介质中地震波的传播多是通过求取单程或双程波动方程的数值解进行模拟的。

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It also recognizes a human in the frame, along with their head and hands position, and the robot is able to be commanded to move to the right with a simple wave of the hand.

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But others say a trigger could be as simple as a wave of sellers, long holding out for their asking prices, suddenly capitulating.

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It was as simple as that first wave: while filming a television commercial for the franchise, an actor in costume waved to passersby.

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