清

• One couldn't make out what the dark mass was from a distance .
  看不清是些什么东西。
• The match was completely sold out .
  比赛的票已售清。
• The pulse is almost imperceptible .
  脉搏几乎摸不清。
• I drink black coffee while he prefers it with cream .
  我爱喝清咖啡而他喜欢加奶油的。
• All memory of his boyhood has faded from his mind .
  他已经记不清自己童年时代的情景。