帮我看看这句英语有语法错误吗?
问题描述：
帮我看看这句英语有语法错误吗?
And,besides,mileage improvement by improving torque up by an engine sound becoming quiet and getting closer to perfect combustion,torque,it is it with clean of exhaust gas.
大意我是明白了,但是我就是觉得这个句子的语法和用词很有问题,
答
mileage improvement by improving torque up by an engine sound becoming quiet and getting closer to perfect combustion
缺一个动词吧?如果sound做动词用,应该加一个s