The main reason is that the injection changes the local separation characteristics and boundary layer structures.

二是改变了当地的附面层结构，而附面层特性的改变是主要的影响。

youdao

The main reason is that the injection changes the local separation characteristics and boundary layer structures.

二是改变了当地的附面层结构，而附面层特性的改变是主要的影响。

youdao