The controller process — perhaps after performing some computations using as input the multiplying factor sent to it by the device — sends a new factor down to the device over a dedicated channel.

控制器进程——可能在用设备发送给它的乘数做了某些计算中的一种——通过专用通道把一个新乘数发送回设备。

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This makes the device suspend itself and send the current value of the multiplying factor to the controller over a second channel.

这使设备中止自身，并把乘数的当前值通过第二个通道发送给控制器。

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You can also change brightness proportionally by multiplying each color channel by a value greater than 1 to increase brightness and a value less than 1 to reduce brightness.

你也可以按照比例给每一个通道乘以一个数，大于1的数增加亮度，小于1的数减少亮度。

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