Between 和 Among 的用法辨异

一、between 和 among 都是介词，都作“之间”、“中间”讲，但前者用于“两者之间”，而后者用于“三者以上中间”

1. What is the difference between a pager and a mobile phone? 寻呼机和移动电话之间的差别是什么？（后置定语）
2. He will come back between one and two o’clock. 他将于 1 点到 2 点之间回来。（状语）
3. It is due to the free motion among the molecules. 这是由于分子中间的自由运动的缘故。（后置定语）
4. Among all the machines computers are used most widely. 在所有机器中，计算机使用最广泛。（状语）

二、注意 between 和 among 介词短语作另一介词的宾语

1. The air has been removed from between the two pipes. 已从两管之间抽走了空气。（作介词 from 的宾语）
2. We must select the best notebook computer from among those ones. 我们必须从那些笔记本电脑中间挑出最好的一台。（作介词 from 的宾语）

三、between 用于“三者以上”，则表示其中每两个之间的相互关系

1. We put emphasis on the friendly relation between the people of all countries. 我们强调各国人民之间的友好关系。
2. Early man did not know how to explain the difference between gases, solids and liquids. 早期人们不懂如何解释气体、固体和液体之间的差别。
3. The ester must be separated between each washing. 各次洗涤之间必须将这种酯分离出来。
4. Compare the difference between doing business in the Arab world and in your country or the US. 请比较一下在阿拉伯世界和你们国家或在美国做生意之间的差别。

四、between 作副词用法举例

1. In gases, the particles are far apart with empty space between. 在气体中各粒子空隙间距大。
2. We would like two rooms with a bath between. 我们愿要两个房间，中间有一个浴室。