This book makes a significant contribution to dietetics.

　　此書對營養學有很大貢獻。

　　Suggest you buy this book dietetics teaching material, there is detailed introduction inside.

　　建議你買本書營養學教材，里面有具體的介紹。

　　He gave me a piece of advice on how to learn genetics.

　　他就如何學好遺傳學給我提出了一條建議。

　　The study of psychology has recently been widely cross-fertilized by new discoveries in genetics.

　　心理學研究最近從遺傳學的新發現中受益匪淺。

　　Smoking, rather than genetics, was the cause of his early demise.

　　導致他英年早逝的原因是吸煙而非遺傳。