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月听力原文
柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
磁盘操作系统
DOS is the part of a computer operating system that controls and manages files and programs stored on disk. DOS is an abbreviation for (缩略=) 'disk operating system'.