重点讲解：
1. abide by 遵守，遵照（法规、约定等）；
If you join the club, you have to abide by its rules.
如果你参加俱乐部，你就得遵守它的规章。
2. withdraw from 退出(活动或组织)；
The company all but withdrew from that market for much of the 1990s.
在上世纪90年代的大部分时期，该公司几乎完全退出了北美市场。
3. get on with 继续做；开始做；
Jane got on with her work.
简继续干她的工作
4. at hand （空间或时间上）接近的，不远的；
When he writes, he always keeps a dictionary at hand.
他写作时手边总备有一本词典。