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。