“变差”用英语怎么说？

磁带成本高，而且每录制一次音质就会变差一些。Tape is expensive and loses sound quality every time it is copied.她的视力因年岁的增长而变差了.Her eyesight grew dim with age.房子不会因为几块烂木板就变差.A house isn't in poor condition because of a few rotten boards....

“变差”的拼音为：biàn chā...