two cycle engine

例句：

1. 1.The two-stroke engine is a popular choice for small cars.
   两冲程发动机是小型汽车的热门选择。
2. 2. The two-stroke engine produces less pollution than a four-stroke engine.
   两冲程发动机产生的污染比四冲程发动机少。
3. 3.The two-stroke engine is more efficient than the four-stroke engine.
   两冲程发动机比四冲程发动机更高效。