outboard cooling

例句：

1. 1.The boat's outboard engine is the main source of power for the vessel.
   这艘船的外部引擎是船只的主要动力来源。
2. 2. During hot weather, the outboard cooling system helps to keep the cabin cool.
   在炎热的天气里，外部冷却系统有助于保持舱内凉爽。
3. 3.The outboard cooling system is essential for maintaining a comfortable temperature in the cabin during long-distance travel.
   在长途旅行中，外部冷却系统对于保持舱内温度舒适至关重要。