The dolphin is an intelligent animal.
海豚是聰明的動物。
A dolphin leapt out of the water.
海豚躍出水面。
A large proportion of the dolphins in that area will eventually die
那片區域里的很大一部分海豚終將死去。
Whales and dolphins are still being slaughtered for commercial gain.
仍然有人為了商業利益大肆捕殺鯨魚和海豚。