我们用煤气做饭。
More and more people cook with gas, for it is convenient.
越汽油，来越多的人用天然气做饭，因为它很方便。
We usually cook food with gas.
我们通常用煤气来烹饪食物。
With the help of the pressure-cooker, we cook chicken soup with less time and gas.
我们用压力锅炖鸡汤，节省了时间和煤气。
With the help of the pressure-cooker, we cook chicken soup with less time and gas.
我们用压力锅炖鸡汤，节省了时间和煤气。
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