Example is better than precept.

(谚)以身作则胜于口头训诲/身教重于言传

重点词语：example n.例子;榜样;借鉴

商务用语：a typical example 典型例证

make an example of sb. 惩一儆百

At that time one British pound exchanged for $2.80.

那时，一英镑可以兑换2.80美元。

重点词语：exchange vt.交易，兑换 n.交易;(外币)兑换，兑换率

商务用语：bill for exchange 汇票

foreign exchange 外汇

exchange broker 证券交易所经纪人