手表尺寸虽小内部结构确非常复杂且精密，一点点小灰尘或是衣物纤维都会影响手表的走时。
Watch size is small and the internal structure is very complex and sophisticated, a little bit of dust or clothing fibers will affect the time of the watch.
密封防止了灰尘和其它粒子的进入，但也限制了驱动器的最大尺寸。
The seal prevents the intrusion of dust and other particles but limits the maximum size of the drive.
用于干法制粒，提供精确的颗粒尺寸和密度，便于产品统一混合，控制灰尘，改进流量特性，统一的粒子硬度等。
For dry granulation of powders providing precise control of particle size and density in order to produce uniform blends, control dust, improve flow properties, consistent particle hardness, etc.
便携式和固定式吸式表和控制展台尺寸多样化，对烟、雾和灰尘进行高效率的收集和过滤。
Diverse lines of portable and stationary downdraft tables and control booths of varying sizes for fume, mist and dust collection provide highly efficient collection and filtration.
如果把整个原子的尺寸看成电影院大小，它的核则如同一粒灰尘大小，然而原子的质量几乎全部集中在原子核。
If the whole atom were the size of this theater, its nucleus would be like a speck of dist. Yet the nucleus contains almost all of the atom 's mass.
如果把整个原子的尺寸看成电影院大小，它的核则如同一粒灰尘大小，然而原子的质量几乎全部集中在原子核。
If the whole atom were the size of this theater, its nucleus would be like a speck of dist. Yet the nucleus contains almost all of the atom 's mass.
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