This is a sea turtle.

这是一只海龟。

If I ever meet a sea turtle, I'll ask him.

如果我见到海龟的话，我会问他的。

Look, there is a big sea turtle over there.

看，那里有一只大海龟。

This green sea turtle spends most of its life in the ocean.

这只绿海龟的大半生都是在海洋里度过的。

The green sea turtle, could only swim around in a very limited range because she only had one flipper.

这只绿海龟只能在很有限的范围里游，因为她只有一只鳍。