For example, to model the sound of a drum, there would be a formula for how striking the drumhead injects energy into a two dimensional membrane.

举例来说，对于模拟鼓声，将有一个公式阐明敲击鼓面加添能量到二维的膜。

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On a recent morning, one group was stationed in the hallway singing “Frère Jacques” in Mandarin; in a classroom, another group was imitating the sound of rain on a giant drum (it was pouring outside).

在最近一天的一个早上，有一个组被分配站在走道中用汉语唱《雅克兄弟》；在教室中，另外一组用一个巨大的鼓模仿下雨的声音（外面也确实正在下雨）。

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When someone beats a drum, it is the flexing of the membrane on the drum, first deflecting then rebounding, which causes the sound waves that we can hear.

当某人敲了一下鼓，是鼓面的伸缩，先压缩，然后反弹，由此制造了我们能听到的声波。

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If it was sound that was being received that might be beating of a drum, for example, that sound gets transduced.

如果将配体看作是,有待接受的敲鼓声,声音信号得到了转换

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Listen out: it will sound like a quickening drum beat followed by a bottle of champagne being uncorked and poured.

BBC: A Scottish-style safari

It is easier to dress soldiers in bright uniforms and have them march to the sound of a fife-and-drum corps than it is to have them ride six hundred miles through the desert on the back of a camel.

NEWYORKER: How David Beats Goliath

It worked not only as a sound bite, but also as a resonating drum of action for generations to come.

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