a ring

• He saw that on the hand he held there was a ring .
  他发现他拉着的那只手上戴着一枚戒指。
• Such a ring of conductors is called an electric circuit .
  这样一个导体环路称为一个电路。
• There is a ring at the door .
  有人按门铃。
• The diamands don't sparkle like those you see on a ring .
  钻石并不象你在戒指上见到的那么光耀夺目。
• Give her a ring .
  给她去个电话。
• He noticed upon her finger a ring that had once belonged to him .
  他注意到她手指上戴的一枚戒指原来是他的。
• They are a ring of dealers controlling prices at an antiques auction .
  他们是操纵古物拍卖价格的一帮买卖人。
• Within the epidermis develops a ring of parenchyma cells, the cortex .
  在表皮细胞内有一个质壁细胞环，即皮层。
• A ring of muscle, the cardiac sphincter, surrounds the esophagus at this point .
  此处有一肌肉环即贲门括约肌围绕着食道。
• You are to bring me a ring that i have dropped into the bottom of the red sea .
  你把我以前掉进红海海底的戒指给我捞上来。