motor chamber diameter

例句：

1. 1. The engine's performance is directlyrelated to the size of its motor chamberdiameter.
   发动机的性能与发动机气缸直径的大小直接相关。
2. 2. The design of the new carhas been optimized to reduce the motor chamberdiameter for better fuel efficiency.
   新款汽车的设计已经优化，以减少发动机气缸直径，以提高燃油效率。
3. 3. The manufacturer claims thattheir motor chamber diameter is the smallest inthe market.
   制造商声称他们的发动机气缸直径是市场上最小的。