Ob-against,over
If we beat Central High tomottow,we shall have removed the last obstacle us and the championship.
如果我们明天击败中央中学，便于工作扫除我们与冠军之间的最后障碍。
Today’s rain has completely obliterated yesterday’s snow;not a trace remains.
今天下的寸把昨天的积雪完全除去，一点不留。
The notion that she had forgotten to lock the front door obsessed mother all through the movie.
在看电影的时候，忘了销前站的想法一直萦绕着妈妈。
The disabled vehicles obstructed traffic until removed by a tow truck.
抛锚的车子直到被拖车拖走后才不阻碍交通。
It is unwise for an outsider to obtrude his opinions into a family quarrel.
局外人硬把自己的想法加入一场家庭争论中是不智的。
By removing her hat,the lady in front obviated the need for me to change my seat.
前座的小姐脱掉她的帽子，使我不必换座位。