n.微米；百万分之一米(长度单位；符号为μm)
Micrometre: One-thousandth of a millimeter. 微米:百万分之一米。
On average,bacterias are about I micrometre long. 有些细菌对人类是益的，但更多的是有害的。
In this case, the landfill leachates can be purified effectively by the method of Sublime Micrometre Filtration(SMF). 应用亚滤技术作深度处理，可有效地去除剩余的污染物质，使出水达标。
The team's explanation is that the outer ring is made of very fine water ice particles, mostly less than a tenth of a micrometre across. 该小组解释说,光环外圈由无数水冰碎屑组成,大部分水冰屑仅为十分之一毫米大小。
The particles may be metal or metal compounds, and are often smaller than one micrometre ( one fiftieths the width of a human hair). 这些微粒可以是金属也可以是金属化合物，通常比一微米还小（头发丝的1/50）。
