There is a sense in which morality and expedience need not conflict.
从一种意义上说，道义和利益不一定冲突。
Necessity has no law, and expedience is often one form of necessity.
需要所至无法律，而”为目的不择手段”经常是一种需要。
This system has universality, expedience to use, and expansibility in practice.
该系统在使用中具有广泛性、高效性、使用方便性和可扩展性。
This system has universality, expedience to use, and expansibility in practice.
该系统在使用中具有广泛性、高效性、使用方便性和可扩展性。
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