知

• They were fairly at a loss for a reply .
  他们张口结舌，不知怎样回答好了。
• The nascence of that kind of animal is unknown .
  那种动物的起源不为人知。
• Their confidences were becoming intimate .
  知已话愈谈愈贴心了。
• Parting is all we know of heaven .
  死亡是我们对天堂的全部所知。
• It was erected before the time of living memory .
  它建造的时间为人所不知。
• Fools never know when they are well off .
  人若愚痴，有福不知。
• The science of intoning was unknown .
  吟诵的学问还不为人所知。
• You may know a man by the company he keeps .
  观其友则知其人。
• You may judge his character by his friends .
  观其友则知其人。
• Anyone with a discerning eye can easily see ( that ... ) .
  明眼人一看便知。