He didn't want a family because he didn't want to be tied down.

他不想要家庭，因为他不想受限制。

I really don't wanna be tied down.

我真的不想被绑住。

I don't wanna be tied down.

我不想被束缚住。

We are tied down by fuel.

我们被燃料死死地绑住了。

I'm tied down here all day by the work.

我整天都给工作拴在这里了。