He recounted his seeings and doings. 他详细叙述了他的所见所为。
The strength of the laser signals received at the two sections in different seeings has been respectively calculated and the precision of comparison results has been analysed in this paper. 本文分别给出两个站在不同能见度情况下所接收到的激光信号的强度,分析了比对结果的精确度。