重点讲解：
1. due to
由于；因为；
eg. The team's success was largely due to her efforts.
这个队的成功在很大程度上是她努力的结果。
eg. Due to circumstances beyond our control the lecture was cancelled.
由于无法控制的情况，讲座取消了。
2. stand-in
n. 别人生病或不在时的）临时替代者，顶替者；
eg. He was a stand-in for my regular doctor.
他临时代替平常给我看病的那位医生。
eg. Tom acted as my stand-in while I was abroad.
我出国期间由汤姆代职。
3. nothing but
只有，仅仅；
eg. All that money brought nothing but sadness and misery and tragedy.
钱带来的只是悲伤、痛苦和灾难。
eg. It did nothing but make us ridiculous.
这只是让我们显得很滑稽。
4. break into
突然开始做（某事）；
eg. The moment she was out of sight she broke into a run.
她一走出众人的视线就开始飞奔起来。
eg. Then, breaking into a smile, he said, 'I brought you something.'
然后，他忽然露出笑容，说道：“我给你带了一样东西。”
5. once in a while
偶尔；间或；
eg. Earrings need to be taken out and cleaned once in a while.
耳环要偶尔取出来清洗一下。
eg. Once in a while she phoned him.
她间或会给他打个电话。