fuel contents gauge

例句：

1. 1. The fuel content gauge is used to measure the amount of fuel in the tank.
   燃料含量表用于测量油箱中的燃料量。
2. 2. The fuel content gauge was a critical tool for determining the efficiency of the engine.
   燃料含量表是确定发动机效率的关键工具。
3. 3. The fuel content gauge showed that the tank was almost empty.
   燃料含量表显示油箱几乎空了。