fuel brick

例句：

1. 1.The old house needed a new fuel brick to keep it warm.
   这所老房子需要一块新的燃料砖来保持温暖。
2. 2.The engineer used a fuel brick to power the machine.
   工程师使用一块燃料砖来给机器供电。
3. 3.The construction workers were busy installing fuel bricks in the basement.
   建筑工人正在忙着在地下室安装燃料砖。