You can turn off the water when you are not using it.

在你不用时候，把水关掉。

No, you don't have to. It's a duty-free shop.

不用，那是个免税商店。

Not for me, you understand.I tear 'em off.

不过我是不用 我总是把它撕掉。

Next one, this is a verb that a lot of people don't use.

接下来，这是一个很多人都不用动词。

Not necessary. Penny and I are perfectly comfortable sharing a bed.

不用 我跟佩妮完全不介意睡一张床。

Most people just throw stuff into a closet.

可是大部分人只会把不用东西扔进柜子里。

Oh, nothing. Just some math we don't need.

哦，什么都不是，就是我们已经不用一些计算步骤。

We had to have somebody out there, an ex-army tent.

我们得找个人，还有一个不用军队帐篷。

What is the point of having them if we never use them?

东西摆着不用意义何在呢？

I don't want you to be sorry.

我不用你对不起。

Paul was never even supposed to die.

保罗本来不用死。

Why don't we just use your portal gun?

为什么不用你传送枪？

And, she adds, donate your unused food to an organization that helps those in need.

而且，她补充说，把你不用食物捐给一个帮助那些需要帮助人组织。

Okay, you don't have to holler.

不用大呼小叫。

I also tried to conserve energy by switching off lights and appliances that are not in use.

我还试着通过关掉不用灯和电器来节约能源。

There is no question about her ability.

她能力是不用怀疑。

Well, we don't do the hike, do we?

我们不用去，对吧？

We don't have to make conversation.

我们不用聊天。

Growing food from parts of plants not used in cooking also reduces waste and saves money.

将烹饪不用植物部位用于种植食物也减少了浪费，节省了资金。

And again, it actually doesn't have to be this way.

同样地，其实可以不用这样。