The next development in arithmetic was the invention of mechanical devices and machines to speed up the execution of arithmetic processes.
算术上的第二项进展是加速算术运算的机械装置和机器的发明。
The next development in arithmetic was the invention of mechanical devices and machines to speed up the execution of arithmetic processes.
算术上的第二项进展是加速算术运算的机械装置和机器的发明。
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