节能的英文：
conserve energy
energy-saving

参考例句：

Energy-saving windows
节能窗

Energy saving weather stripping
密封条起到节能作用。

Even the positioning of a window to optimise daylight can help save energy.
连充分利用日光的窗户都是节能的。

Energy-saving shutters/blinds
节能百叶窗

Residential Energy Saver Oil-Powered
家用节能燃油热水器

The new kind of controllable power source is a good assistant in energy saving.
可控新电源，节能好助手。

The houses will boast the latest energy-saving technology.
这些房屋将采用最新节能技术。

The new generation of microwave oven is popular for its remarkable energy saving.
微波炉新一族，节能显著受欢迎。

He took part in a program of household savings on energy use.
他参与过一个家庭节能计划。

Several businesses also attempted to do their part.
一些商店也尝试尽自己之力节能。

conserve是什么意思：
v. 保护；保藏，保存；使能量守恒；用糖保存食物
n. 果酱，蜜饯

conserve momentum
使动量守恒

Conservation is of the utmost importance.
保护自然资源至关重要。

We are not creatures of the Conservative government.
我们不是保守派政府的傀儡。

energy是什么意思：
n. 能量；精力；活力；精神

disintegration energy
蜕变能

triggering energy
触发能

The energy of motion is called kinetic energy.
运动的能量称为动能。

saving是什么意思：
n. 节约；存款；挽救
adj. 节约的；保存的；补偿的；救助的
prep. 除…以外
v. save的现在分词

Saving is getting
节约等于收入

Save the macro.
保存这个宏。

Her savings were in the Post Office Savings Bank.
她的钱存在邮政储蓄银行里。