The upper stage will have a smaller engine, says Meng, without giving details.

上面级将有一个更小的发动机，孟说，没有透露更多细节。

youdao

The upper stage will have a smaller engine, says Meng, without giving details.

上面级将有一个更小的发动机，孟说，没有透露更多细节。

youdao