outside cylinder

例句：

1. 1. The car's engine is located inside the cylinder.
   汽车的发动机位于气缸内。
2. 2. The scientist used an outside cylinder to collect samples.
   科学家使用一个外圆柱来收集样本。
3. 3. The engineer designed an outside cylinder for the new building.
   工程师为新建筑设计了一个外圆柱。