通过理论分析，给出方形喷洒域变量施水精确灌溉喷头的射程、流量和转速应服从的变化规律和计算公式。
The variation principles of the throw distance, flow rate and rotation speed of variable-rate sprinklers for precision irrigation on square area were given.
机器人应服从人的一切命令，但命令与第一定律相抵触时例外。
A robot must obey the orders given to it by human beings, except where such orders would conflict with the First Law.
有些人甚至一辈子都在肥与不肥间循环往复，衣柜里的衣服从小号到中号、到大号，到超大号一应俱全。
Some of us have spent a lifetime cycling between the fit and fat versions of us. We even have the small, medium, large and industrial sections in our wardrobe.
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