weight index of engine

例句：

1. 1. The weight index of the engine isan important factor in determining its performance.
   发动机的重量指数是决定其性能的重要因素。
2. 2. Theengineers carefully measured the weight index ofthe new engine to ensure it meets safetystandards.
   工程师们仔细测量了新发动机的重量指数，以确保它符合安全标准。
3. 3.The weight index of the engine is ameasure of its efficiency and can be usedto optimize its design.
   发动机的重量指数是一个衡量其效率的指标，可以用来优化其设计。