源操作数和目的操作数的顺序。
一旦确定操作数和操作符后，就可以执行运算了，如清单12所示。
When we determine the operands and operator, we can perform the operation, as shown in Listing 12.
从而有效地减少了现有方法的操作数和减轻了网络和串口传输负荷。
It can effectively reduce operations and transmission load of network and serial port.
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