So weak does the body's immune system become that the person often becomes very ill from usually mild sicknesses.

身体的免疫系统变得如此脆弱，以至于人们经常因为轻微的疾病而变得非常虚弱。

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Five: feeder, the feeder is very important, we must choose good, and we want to know the general antenna distance can't more than 50 m, or receiving signal will become weak.

五：馈线，这个馈线很重要的，我们必须要选择好，而且我们要知道一般的天线距离不能超过50米，要不然接收的信号就会变弱。

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When the skybridge rigidity is weak comparing with that of the buildings, the wind vibration analysis and wind resistant analysis become very important in the design of skybridge.

因此当连廊的刚度与主体建筑刚度相比较弱时，连廊的风振分析与抗风设计往往成为设计中的关键问题之一。

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"Your muscles get cold and are instantly paralyzed by the hyperventilation, and you can become very weak, " says Dr. Thomas Traill, a cardiologist and professor of medicine at Johns Hopkins University School of Medicine.

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"He's become a very weak mayor, " said Rahaman Muhammad, president of the Newark labor union, SEIU Local 617, a former supporter who is now an outspoken critic.

WSJ: Cory Booker Eyes Third Term as Newark Mayor

When you have done a few presentations, you will become very familiar with the areas in your business that are weak.

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