外过滤系统具有一定优点，它可以弥补内过滤系统不足。

The outer filtration system has some advantages, it can make up the deficiency of the inner filtration system.

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或许该员工在培训的过程中错过了些什么，这导致了系统不足进而造成他的工作低于公司的标准。

Perhaps the employee has missed something in the training process, and this has created a systems deficiency that is causing the work to fall below the company’s standards.

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提出采用先进技术改进现有仿真系统不足的有效途径，对复杂武器系统的综合仿真具有参考价值。

The goal is to use the advanced technology effectively and to improve the deficiency of existent simulation system. It is a useful reference for synthesis simulation of complicated arms system.

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Now, if I was a person that was designing a vaccine and I noticed that this was the response that it got, that antibodies were produced, they reached some intermediate level, they started to fall, I would say, "Well I haven't stimulated the immune system enough, let me re-boost, let me give another dose of antigen."

现在,如果我正在研究一种疫苗,我注意到机体会对这种疫苗产生应答,也就是会产生抗体,当抗体浓度达到中等水平后,就开始下降,就可以说,疫苗对免疫系统刺激还不足,我需要提高抗原浓度,让我再把剂量再加大一倍

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