I went swimming in the sea.

我去海里游泳了。

Some people stopped swimming in the sea.

有些人停止在海里游泳。

Swimming in the sea has many health benefits.

在海里游泳对你的健康有很多好处。

Children's books often depict the plesiosaurus swimming in the sea.

儿童书籍中常常描绘蛇颈龙在海中游泳的场景。

We went swimming in the sea.

我们去海里游泳了。

I like that place because I like swimming in the sea.

我喜欢那个地方，因为我喜欢在海里游泳。

It's wonderful, you can see the whales swimming in the sea, the sea lions lying on the beach and the penguins.

太棒了，你可以看到鲸鱼在海里游泳，海狮躺在沙滩上，还有企鹅。

Jimmy is swimming in the sea!

这是“现在进行时态”的句子。

What about swimming in the sea?

在海里游泳怎么样？

Swimming in the sea makes him excited.

在大海里游泳使他很兴奋。