1、The submillimetre wavelength region is usually defined as ranging from 300 μm to 1 mm.
亚毫米波长区通常被定义为从300微米到1毫米。
2、The submillimetre is a unit of length equal to one billionth (10^(-9)) of a meter.
亚毫米是长度单位,等于一米的十亿分之一。
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