重点讲解：
1. blow up 引爆；（使）炸毁；（使）爆炸；
He was jailed for 45 years for trying to blow up a plane.
他因为企图炸毁一架飞机而被判入狱45年&o[BnHJOVwyw9=。
2. crack down on 严厉打击；镇压；
The police ran a sting operation to crack down on illegal guns.
警方展开诱捕行动以严打非法枪支=z+6Ou4O]ltMOo9。
3. resort to 诉诸；采取；
She would never resort to the law courts to resolve her marital problems.
她无论如何不会上法庭解决婚姻问题aw=MUDbofH。
4. go back on 违（约）；食（言）；违背（诺言等）；
The budget crisis has forced the President to go back on his word.
预算危机迫使总统违背自己的承诺MQT7M01RXuUrm|U(K。