life-sustaining
-eg: Water is life-sustaining, however, it is contaminated by th epollution discharged by chemical factories.;
preserve/protect/conserve
-eg: Its the compelling responsibility of every one to preserve the envirnment.
国内英语资讯:Chinese top legislator calls for enhanced ties with Zambia
国内英语资讯:Economic Watch: Regulation, monetary cocktail to keep liquidity stable
Chosen one
Window dressing
The wheat from the chaff
国内英语资讯:Chinese, Vietnamese presidents hold talks on ties
研究：美银行法拍屋降至2005年来最低点
国际英语资讯:UN Security Council asks Guinea-Bissau to name new prime minister
Another false start?
Brick wall?