We're decided to convert from solidfuel to natural gas when the cold weather sets in.
我们决定在寒冷天气到来以后停用固体燃料，改用天然气。
2
They have converted from solidfuel to natural gas.
他们已把固体燃料转变成天然气。
3
A calculation model is set up for a combined power generation system, which comprises a solid-oxide fuel cell with natural gas serving as its fuel and also a gas turbine (GT).