（1）common意为"普通的"，"平常的"，指常见的，常常发生的，不足为奇的.如：
The birds are very common here.这些鸟在这儿很常见.
The common man in every country is anxious for world peace.
每个国家的老百姓都渴望世界和平.
Snow is common in cold countries.在寒冷的国家雪是常见的.
（2）ordinary意为"通常的"，"普通的"，有"日常的"，"随时都可以碰到的"含意，与common意思相近.如：
An ordinary workday is eight hours.一个工作日通常是八个小时.
It was a very ordinary day today.今天是很平常的一天.
He is a little man with ordinary looking.他是个个子矮小，相貌普通的人.
Tom Sawyer was an ordinary American boy who kept getting into trouble.
汤姆·索耶是个常常惹事生非的普普通通的美国男孩.
