Use of the fourth generation multigrade oil for diesel engine can cut down the warming up hours, save energy, reduce engine wear, and so on.
多级四代机油具有良好的低温起动性能以及节能性能，使用该油品可以缩短打温时间、节约能源、减少柴油机磨损等。
In the long run, natural gas will replace oil and become the fourth generation energy in the world.
从长远来看，天然气将替代石油成为人类第四代能源。
Natural gas will become the fourth generation energy of human beings.
天然气将成为人类第四代能源。
Regarding economy, source of energy and environment as a whole, natural gas will become the fourth generation source of energy instead of crude oil in the twenty first century.
从经济、能源、环境整体来看，廿一世纪天然气将替代石油成为人类第四代能源。
Regarding economy, source of energy and environment as a whole, natural gas will become the fourth generation source of energy instead of crude oil in the twenty first century.
从经济、能源、环境整体来看，廿一世纪天然气将替代石油成为人类第四代能源。
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