重点讲解：
1. on record
有记录的；有记载的；
eg. This could have been one of the coldest golf tournaments on record.
这很可能是高尔夫锦标赛比赛史上天气最为寒冷的一次。
eg. Last summer was the wettest on record for 50 years.
刚过去的这个夏季是50年来记录中雨水最多的。
2. no picnic
不是件轻松（或愉快）的事；
eg. Emigrating is no picnic.
移民不是件轻松的事。
eg. It's no picnic having to look after six small children all day, you know!
你知道，整天得照看六个小孩可不是一件轻松的事。
3. thanks to
幸亏；归因于；
eg. Thanks to that job I became an avid reader.
多亏了那份工作我才成了一个喜欢阅读的人。
eg. Thanks to recent research, effective treatments are available.
多亏近来的研究才有了有效的疗法。
4. come across
偶然发现；偶然遇见；
eg. I came across this book in an old bookstore in London.
我在伦敦一家旧书店里发现了这本书。
eg. I can't find my keys. If you come across them, please put them on the table.
我找不到我的钥匙，如果你在哪里看到的话，就将它们放在桌上。
5. safe to say
有把握的；不会有错的；可以肯定的；
eg. I think it is safe to say that very few students expend the effort to do quality work in school.
我认为可以肯定地说学校里很少有学生肯为学好功课下功夫。
eg. It is safe to say that the scientific method made possible the technological civilization of today.
完全可以这样说,，科学方法使今天的技术文明成为可能。
