1. grandfather clause
   保留条款
   
2. grandfather clock
   落地钟
   

1. His grandfather is the watchman of the factory.
   他的爷爷是这个工厂的守夜人。
2. I am named after my grandfather.
   我以我祖父之名被命名。
3. My grandfather attained the age of ninety.
   我祖父已到九十岁高龄
4. You derive your temper from your grandfather.
   你的脾气传自你祖父
5. I was named after my grandfather.
   我以我祖父的名字命名。

　1个名词解释