Slow degradation of ground water quality may result from repeated use.循环使用地下水可以导致缓慢的水质降低.The point of degradation, due to attenuation or distortion, at which a signal becomes unusable.由于衰减或失真使得信号变得不能使用的那个退化点.Microbial de...
This is not a matter for self-congratulation.你不应该为此事沾沾自喜。We have received many letters of congratulation.我们收到了很多贺信。The letter arrived in congratulation of my graduation from the university.我收到了大学毕业的贺信....