Many car manufacturers now make cars that run on alternative energy sources, although gasoline and diesel are still the most convenient ways to power a car.
现在尽管许多汽车生产商制造能够使用多种能源的车，但汽油和柴油仍然是开动汽车最便利的方式。
Solar energy has not yet faced the danger of exhaustion, and it's the most convenient and the least polluted energy - it can replace other energy sources in all other areas.
太阳的能源还谈不上有枯竭的危险﹐它又是一种最方便﹐污染最小的能源﹐可以在所有领域取代其它能源。
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