重点讲解：
1. back down 放弃（主张、要求、承诺等）；打退堂鼓；
The United States had no intention of backing down in its bitter row over farm subsidies.
美国无意就激烈争吵的农产品补贴问题作出让步Vr=!NV3_kcHa7mw*OCP;。
2. resort to 诉诸；采取；
They felt obliged to resort to violence.
他们觉得有必要诉诸暴力)_PKTkh&TbI27。
3. set fire to 放火烧；使燃烧；
They set fire to vehicles outside that building.
他们纵火焚烧了停在那幢大楼外的车辆O@tG3F5dLqKy-。
4. bring sth. to an end 结束；终结；
I was worried she would walk out or bring the interview to an end.
我担心她会离场或者终止采访4_v+%2DDlU。