air-cooled engine

例句：

1. 1. The new car has a high-performance air-cooled engine that can reach speeds of up to 200 km/h.
   这款新车配备了高性能的空气冷却引擎，最高时速可达200公里/小时。
2. 2. Theold steam engine was replaced by an air-cooled locomotive for its efficiency and safety.
   为了提高效率和安全，旧的蒸汽机车被一台空气冷却的机车所取代。
3. 3. The engineer carefully inspected the air-cooled engine before starting the engine.
   工程师在启动发动机之前仔细检查了空气冷却的引擎。