书籍是人类进步的阶梯的英文

• books are the stepping stones to human progress

• 书籍:    books; works; literature
• 是:    Semantics
• 人类进步:    human progress
• 的:    4次方是 The fourth power of 2 i ...
• 阶梯:    a flight of stairs; ladder; ...

例句与用法

1. The books are the ladder of the progress of mankind
   33书籍是人类进步的阶梯
2. The book is the mankind ' s progressive stairs
   （书籍是人类进步的阶梯。 ）
3. Books are the stepping stones to human progress
   书籍是人类进步的阶梯。