实验结果表明，从开始到吸附量达一定数额这段区域内，总速率由界膜内的扩散速率决定，且为一常数。
The experimental results show that, in the range from the beginning to a certain amount of adsorption, a general rate is decided by the diffusing rate in the scope film and it displays a constant.
因此，电流镜(100)的每个晶体管限定数字模拟转换电路的步，相邻步之间的比率实质上是常数。
Thus, each transistor of the current mirror (100) defines a step of the digital to analog conversion circuit, and the ratio between adjacent steps is substantially constant.
指令具有固定数目的用来对常数进行编码的位。
The hardware instruction has a fixed number of bits to encode the constant.
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