For example, we don't use a plastic bag when shopping, we use both sides of the paper, we turn off the light immediately when not using it.

例如，我们不使用塑料袋购物、使用纸张的两个面、(高中英语作文环保)不使用灯时及时关掉。

youdao

If you normally like to power off your PC when you're not using it, do you ever forget and leave it on?

如果你一般情况下喜欢在不用电脑的时候关机，你是否会时常会忘掉这件事然后让它开着呢？

youdao

If your space is part of a larger room, consider buying an office armoire to hide away your work stuff when you're not using it.

如果你的这个地方是一个大屋子的一部分，你可以考虑买一个办公柜子，当你不工作的时候把你办公用的东西都放起来。

youdao

This is so obvious in this problem, but when you see more complicated formula, you may not know all the assumptions that went into the derivation and quite often you will be using it when you shouldn't.

在这道题中这些都很明显,但是当我们用更复杂的公式时,你可能搞不清楚所有,在推导时的前提,因此很多时候,你都会用错公式

耶鲁公开课 - 基础物理课程节选

After the Pennsylvania spycam incident, in which school-loaned laptops were secretly snapping photos of high school students, many paranoid techies said they would keep duct tape covering the camera in their laptop when not using it.

FORBES: Don't Let Your iPhone See You Naked

They included a tunnel, a bridge or for road traffic to use a nearby railway when trains were not using it.

BBC: Landslide on A890. Pic: Highland Council

Several parties have expressed interest in owning the vessel, he told CNN, adding that there seems to be particular interest in the "intriguing charter opportunities" that may be available to owners when they're not using it.

CNN: Last chance to own a Madoff yacht