随着石油的不断短缺及排放标准的提高，代用燃料发动机越来越受到重视。

Due to shortage of petroleum and enhancement of exhaust emissions standard, the substitute fuel engine has become more and more important.

youdao

随着石油的不断短缺及排放标准的提高，代用燃料发动机越来越受到重视。

Due to shortage of petroleum and enhancement of exhaust emissions standard, the substitute fuel engine has become more and more important.

youdao