triple cylinder

例句：

1. 1. The car has atriple cylinder engine.
   这辆车有一个三缸引擎。
2. 2.The scientist used a triple cylinder to testthe new drug.
   科学家用一个三缸来测试新药。
3. 3. The trip was made upof three consecutive double-decker buses.
   这次旅行由三辆连续的双层巴士组成。