back on

• His socks were soaking wet, as he put his boots back on .
  他穿上靴子，袜子已湿透了。
• He tries to fall back on the other pleasure of life .
  他试图回到生活的其他享乐之中。
• The enemy had to fall back on the second line of defence .
  敌人不得不退到第二道防线。
• Put the book back on the shelf .
  把书放回到书架上。
• I need your help; please don't turn your back on me .
  我需要你的帮助，请别置我于不顾。
• Put the top back on that felt-tip pen or it will dry out .
  给毡头笔套上笔帽，不然就干了。
• He promised to help , he will not go back on his promise .
  如果他答应帮忙，他就不会食言。
• Then it fell back on saugar to await reinforcements .
  随后，舰队撤退到索迦尔岛，等待增援。
• He never goes back on his word .
  他从不食言。
• He went back on his friends .
  他背叛了朋友。