在投影机使用环境中防尘非常重要，一定要严禁吸烟，因烟尘微粒更容易吸附在光学系统中。
In the projector use of the environment is very important in the dust, smoking must be prohibited, because of dust particles more easily adsorbed on the optical system.
本文对自由基在吸烟、职业烟尘微粒、金属离子、石英、石棉等理化因素致肺癌中的作用进行简要综述。
The role of free radicals in the lung cancer induced by physical and chemical factors such as smoking, occupational dust particles, metal ions, quartz, asbestos were briefly discussed in this article.
自由基医学是近年来兴起的一门交叉学科，本文对自由基在吸烟、职业烟尘微粒、金属离子、石英、石棉等理化因素致肺癌过程中的发病机制进行探讨。
This article briefly discussed the role of free radicals in the lung cancer induced by physical and chemical factors such as smoking, occupational dust particles, metal ions, quartz, asbestos.
当烟尘和微粒拜谢到空气中以后，有一层冷空气仍然在贴近地面。
A layer of cold air remains near the ground as smoke and fumes pour into it.
所有的沃尔沃的新柴油发动机还配备了免维护的微粒过滤器，过滤器大约百分之九十五的烟尘颗粒。
All new diesel models from Volvo are also fitted with a maintenance-free particle filter that traps about 95 percent of all soot particles.
所有的沃尔沃的新柴油发动机还配备了免维护的微粒过滤器，过滤器大约百分之九十五的烟尘颗粒。
All new diesel models from Volvo are also fitted with a maintenance-free particle filter that traps about 95 percent of all soot particles.
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