请帮忙翻译几个句子汉译英（不要翻译器）谢谢

Question

早在有恐龙之前就已经有鲨鱼了
他是海洋中最凶猛的动物
鲨鱼非常的大并且有像锯齿一样尖尖的牙
鲨鱼有一身软骨，软骨比骨头更轻有弹性
鲨鱼必须不断的游泳要不然就会窒息

Answer 1

Sharks existed long before there were dinosaurs.
They are the fiercest animals in the ocean.
Sharks are large creatures with sharp saw-like teeth.
Sharks have soft cartilage throughout their entire body, which provides greater flexibility than skeleton.
Sharks have to continuously swim about, otherwise they'll suffocate.

Answer 2

As early as the dinosaurs had a shark
He is the most ferocious animal in ocean
The shark is very big and look like a sawtooth sharp teeth
The shark has a cartilage, cartilage bones than lighter is elastic
It has to constantly swim or will suffocate

Answer 3

As early as in a dinosaur has already before there's a shark
He is the most fierce animals in the ocean
Shark very large and have like a sawtooth sharp teeth
Sharks have a cartilage, cartilage bones lighter than elastic
The shark to unceasing swimming or you will have suffocated