你可以有弱光，常光，亮光，闪光，但如果你持续没有光，那就什么也没有，这才叫黑暗，对吗？
You can have low light, normal light, bright light, flashing light, but if you have no light constantly you have nothing and it is called darkness, isn't it?
在横梁的上方，屋顶的表面覆盖着光伏组件，为展馆提供常所需的能量。
Above the beams the roof surface is covered with photovoltaic modules providing the Pavilion with the necessary daily energy.
目前常采用GS-DFB半导体激光器作为OTDM系统的光脉冲源，这种脉冲源产生的光脉冲一般较宽。
Nowadays, the optical pulse used in the OTDM system is often generated by the gain-switched distributed-feedback (GS-DFB) semiconductor laser, which has a large pulse width and negative chirp.
较差消光改正也不能用常法进行处理。
Differential extinction can not also be corrected by the conventional method.
在常压下对竖直光管和环隙流道内沸腾换热启动阶段的壁温变化规律进行了实验研究。
An experimental investigation on transient of wall temperature in start-up process of pool boiling heat transfer, on vertical plain tube and narrow annuli under atmospheric pressure, was carried out.
在电子显微镜下，常使用一束电子光而不是普通光线来为标本照明。
In electron microscopes a beam of electrons instead of a beam of light is directed onto the specimen.
在电子显微镜下，常使用一束电子光而不是普通光线来为标本照明。
In electron microscopes a beam of electrons instead of a beam of light is directed onto the specimen.
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