oobk組成單詞

組成的單詞是book，意思是書，例如：

1、This book is the result of 25 years of research.這本書是25年研究的結晶。

2、The book wasn't anything like as good as her first one.這本書遠遠不如她的處女作。

3、The book is the fruit of years of research.這本書是多年研究的成果。