Such redundancy cannot be deliberate in organisms as there is no Great Engineer in the sky; rather, they must be a consequence of how the system evolved.
这样的冗余性在生物里是没法想的因为天上没有伟大的工程师，相反他们必然是这个系统进化而来的结果。
These models provide a way to reason about important system concerns before the system is designed and built, and thus offer powerful tools for the systems engineer.
这些模型在系统被设计和构建之前，提供了一种检查重要系统内容的方法，并因此为系统工程师提供了一种强有力的工具。
But the Army Engineer School performed preliminary tests late last year on NIITEK's new miniaturized, remote-controlled version of the system that the company is shopping to the military.
但是，陆军工程学校于去年年底对NIITEK系统的新微型化远程控制版本进行了初步测试。
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