But modifications needed for carrying astronauts could be costly and the launch alliance has also experienced delays and cost overruns.

但是为搭载宇航员而进行的修改花费高昂，联合发射联盟还深受工程延期和成本超支之扰。

youdao

But modifications needed for carrying astronauts could be costly and the launch alliance has also experienced delays and cost overruns.

但是为搭载宇航员而进行的修改花费高昂，联合发射联盟还深受工程延期和成本超支之扰。

youdao