These are the flashes that light the scene, and a high-speed trigger.

它们就是闪光灯和一个高速触发器。

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To trigger the cameras, you have to move over the loops at a particular speed.

为了触发摄相机，你必须以特定的速度在环上移动。

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The two variable resistors in the center are for controlling motor speed and trigger level.

两个可变电阻的中心控制电机转速和触发电平。

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The two variable resistors in the center are for controlling motor speed and trigger level.

两个可变电阻的中心控制电机转速和触发电平。

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