After last week's announcement that Phil Collins might give up touring because live concerts are ruining his voice, doctors are counseling stars about the dos and don'ts of voice care.
出自-2013年6月聽力原文
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
N-UNCOUNT
磁盤操作系統(tǒng)
DOS is the part of a computer operating system that controls and manages files and programs stored on disk. DOS is an abbreviation for (縮略=) 'disk operating system'.