告诉孩子在离开房间时关掉所有的灯，以节约用电。
Tell the boy to switch off all the lights as he leaves the room in order to save electricity.
此计算器如停止操作8分钟，会自动关掉电源以节约用电。
This calculator is automatically turned off approximately 8 minutes after the last key operation to save the batteries.
出门上班前会检查家里的电如电视，电脑，灯泡等是否都关闭了以节约用电。
Also check all electric such as TV, notebook, bulb whether turned off before we go to work.
人们经常告诉我们关掉电灯以节约用电。但是这个建议在移动电话上不适用。
We're often told to turn lights off to save energy, but this advice does not work on mobile phones.
例如，鼓励孩子寻求省钱之道——从公共图书馆借dvd而不是花钱去租，或者随手关灯以节约用电。
For instance, encourage the kids to look for ways to save money - by borrowing DVDs from the public library instead of renting them, or saving electricity by turning out lights.
传感器按需轮换屏幕背景，从肖像画到风景图，简单易行；在用户接听电话时关闭背景以节约用电；并且根据周围光线调整背景亮度。
Sensors rotate the display from portrait to landscape as required, turn off the display to conserve power when a user lifts the phone to his ear and adjusts its brightness according to the light.
还是节约用电以减少建核电站的必要？
Or to save energy to avoid developing more nuclear power projects?
还是节约用电以减少建核电站的必要？
Or to save energy to avoid developing more nuclear power projects?
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