如何使用 "their" 造句

1. We should follow their example .
我们应该向他们学习。
2. Their parameters are quite different .
它们的参数颇为不同。
3. Their eggs are very tough .
它们的卵十分坚硬。
4. We are all their descendants .
我们是他们的后代。
5. The topic was their marriage .
话题是他们的婚姻。