oobk组成单词

组成的单词是book，意思是书，例如：

1、This book is the result of 25 years of research.这本书是25年研究的结晶。

2、The book wasn't anything like as good as her first one.这本书远远不如她的处女作。

3、The book is the fruit of years of research.这本书是多年研究的成果。