当传感器发现粉尘浓度达到了临界水平，就有一定的电荷促使该材料发出除尘波越过其表面。

Sensors detect when dust concentrations reach a critical level and then an electric charge energises the material sending a dust-repelling wave across its surface.

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当传感器发现面板表面的灰尘浓度达到一定水平时，自我清洁技术可以将其清除。

The self cleaning technology can repel dust when sensors detect concentrations on the panel's surface have reached a critical level.

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研究表明使用含氟牙膏能够增加你牙齿中的含氟量，甚至达到某些地区用水中加入高浓度氟的水平。

Studies have shown that using fluoride toothpaste helps increase the concentration of fluoride in the teeth, even in areas with water supplies containing high levels of the mineral.

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That rate of rise is steeper so they--antibody levels go up more rapidly and they reach a higher level.

同时,上升速度也更加迅速,以达到更高的浓度水平

耶鲁公开课 - 生物医学工程探索课程节选

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

耶鲁公开课 - 生物医学工程探索课程节选