为使之完美，我们不得不改变其中一些方程里的符号。
In order to make it perfect, one has to change the signs in some of the equations.
本田汽车厂的工程师们正在努力改进一项新的设计使之完美。
The engineers in Honda Automobile Factory are working toward the perfection of a new design.
生活资料是由一系列顺序相承的技术使之增加并臻于完美的。
Subsistence has been increased and perfected by a series of successive arts.
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