Turn off the lights and anything else electrical when not in use.

关掉电灯和其他不使用的电器。

He foresees a future when electric vehicles are tapped for power when not in use.

他预见未来世界，电动汽车在不使用时可接通电源的。

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的灯和电器来节约能源。

When not in use – the hollow barriers  are filled with water and submerged.

不使用时 - 空心屏障充满水并淹没。

Ironing board The foldable ironing board was easy to store when not in use.

熨衣板 可折叠的熨衣板在不使用时易于存放。

The exposed section will feature flip-up  gates that will lie flat when not in use.

暴露的部分将采用可翻转的门，不使用时可平放。

But I was surprised to see that half the factory wasn't in use because several important customers had cancelled orders.

但是，让我感到惊讶的是，有半个工厂没有在运作，因为几个重要的客户已取消了订单。

How about we design the handles to be non-slip and add a safety lock for when it's not in use?

我们将手柄设计成防滑的，并在不使用时添加一个安全锁怎么样？

Strong winds during the night have blown down a number of trees on the M5 and many sections are not in use.

昨晚的大风吹断了M5路段的很多树木，许多路段已经无法通行。

And the fact that they’re basically empty when not in use can also be a problem, because things can be shoved inside them.

事实上，它们在不使用时基本上是空的， 这也是一个问题，因为东西可以塞进里面。

Water from underground pipes flows all the way up into the tall, above-ground section of the hydrant, called the barrel, even when the hydrant’s not in use.

来自地下管道的水一直向上流入消防栓高大的地上部分， 称为桶，即使在消防栓不使用时也是如此。

This reduces the annual output of carbon dioxide by 660 tons and supplies up to 80 percent of the surrounding area when the stadium is not in use.

这减少了 660 吨的年二氧化碳排放量，并在体育场闲置时供应高达 80% 的周边地区。

First, you want to identify the right words, meaning, words that are in your passive vocabulary, but not in your active vocabulary - words that you know, but you never use.

首先，找到属于你的被动词汇，理解它的含义——你知道的单词，但你从不使用。

Propulsion is provided by 16 small rotors, mounted on the tips of eight arms that fold away when the vehicle is not in use, allowing it to park in small spaces.

推进力由 16 个小转子提供，安装在八个臂的尖端， 当车辆不使用时， 这些臂会折叠起来，使其可以停在狭小的空间内。

He set up a pair of shelves inside the house, as an excellent place to keep various things, such as an almanac—he had bought one at last—and ladles and vessels not in use.

他在房子里放了一对架子， 作为存放各种东西的好地方， 比如年鉴——他终于买了一个——还有不用的勺子和容器。