intelligent

Dolphins are highly intelligent marine mammals that communicate with each other using complex sounds.

(Chinese) 海豚是高度聪明的海洋哺乳动物，它们使用复杂的声音互相交流。

Only an intelligent person with years of experience could solve such a complicated legal puzzle.

(Chinese) 只有具有多年经验的聪明人才能解决如此复杂的法律难题。