drop in与by the way的区别

drop in 是顺便拜访某人
by the way 是固定说话，顺便说一下 的意思

drop in at a place..

1. 顺便拜访某地

2. 顺便拜访某一场所

例句

1. Aid to the Third World is at present little more than a drop in the ocean.
目前对第三世界的援助不过是杯水车薪.

2. Let's drop in on Nick when we're in Bristol, shall we?
咱们在布里斯托尔的时候，去看看尼克，好吗？

3. Please drop in for tea.
请顺便来喝杯茶。

4. The factory has laid off workers because of the drop in sales.
因为销售额减少, 工厂解雇了一批工人。

5. The government has to calculate the likely effects on revenues of a big drop in the oil price.
政府必须估算出油价大幅度下降对财政收入可能产生的影响。

6. Please drop in at my office.
请顺便到我办公室来一趟。

7. Drop in to see us any time .
随便什么时候顺便来看看我们。

8. We really welcome a drop in prices.
我们确实欢迎物价下降。

9. The drop in price is never expected.
价格的下跌是完全没有料到的。

10. Please drop in to tea.
请随便来我家喝茶。

by the way..
1. 顺