这样制成的薄膜可以被用来制造一种新型扩音器，这种扩音器通过加热和冷却空气工作，而不再是直接通过往复运动使空气产生振动效果。
These films can be used to make a new type of loudspeaker that works by heating and cooling the air, rather than bouncing up and down to vibrate the air directly.
利用玩具激光器对薄膜干涉和布朗运动实验进行改进，使实验现象更加明显、直观。
The film interference experiment and the Brownian motion experiment are improved by using toy laser, and the experimental phenomena are more obviously.
利用有限差分法，导出了轴向运动矩形薄膜横向振动控制系统的状态方程。
Using the finite difference method, the state equation of the transverse vibration of an axially moving rectangular membrane is derived.
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