聪明的英语怎么写

　　例句：

　　The dolphin is an intelligent animal.

　　海豚是聪明的动物。

　　She's even more intelligent than her sister.

　　她甚至比她姐姐还聪明。

　　He's intelligent enough but he lacks motivation.

　　他很聪明，但缺乏积极性。