| 第 1 页：听力练习 |
| 第 2 页：文本参考中文翻译 |
| 第 3 页：词汇讲解 |
| 第 4 页：语法讲解 |
1.backed by 以......为凭据/支撑/后台
例句：
Backed by bullion rather than by credit.
以金银为凭的以金银储备而不是银行存款为凭证的。
2.mince words 说话委婉、绕来绕去
例句：
Don't mince words: say what you mean.
不要忌讳：把你的意思直说出来。
The teacher didn't mince words in telling the students of their poor homework.
老师毫不客气地告诉学生说他们的家庭作业做得太差劲。
3.tap into 深入了解
例句：
I really need to tap into law of tax .
我很需要深入了解下税法。
4.keep afloat 免于破产
例句：
The inheritance kept them afloat for years.
遗产使他们好多年免于经济困难。
