在它首次公开试飞后，还需大约三年的调试才会进行商业用途。

Following its initial outing test flights will be conducted for about three years before being put into commercial use.

youdao

在它首次公开试飞后，还需大约三年的调试才会进行商业用途。

Following its initial outing test flights will be conducted for about three years before being put into commercial use.

youdao