重点讲解：
1. be easy to do sth.
容易的；不费力做某事；
eg. If he thinks it's easy to get a job, he's living in a dreamworld .
如果他认为找工作容易，那么他就是在白日做梦。
eg. It's not easy to rid oneself of a habit.
要改掉一个习惯是不容易的。
2. sniff out
嗅到；找到；发现；
eg. A police dog, trained to sniff out explosives, found evidence of a bomb in the apartment.
一只训练有素、专门嗅找炸药的警犬在公寓里发现了炸弹的痕迹。
eg. It's his job to sniff out abuses of power.
他的职责就是查究滥用权力的行为。
3. be eager to do sth.
热切的；渴望做某事；
eg. The police is eager to get to the bottom of this mystery.
警方急切地想弄清这一神秘事件的真相。
eg. He is eager to dispatch the matter in hand.
他急于了结手头的事情。