透过率起伏信号可用来测量颗粒粒径和浓度。
The fluctuating transmission signal can be used to measure particle size and particle concentration.
起伏不定的信号格，随意就无服务，完全不工作，电话停机——从苹果社区到博客世界，已经是牢骚遍地。
Fluctuating bars of service, random outages, not running entirely, shutting down the phone - the complaints on the Apple forums and throughout the blogosphere have ranged pretty extensively.
相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
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