Not, however, without one key condition: more progress on European defence.

然而，一个主要的条件却是必不可少的，即要在欧洲的防御上获得更多的进展。

youdao

Not, however, without one key condition: more progress on European defence.

然而，一个主要的条件却是必不可少的，即要在欧洲的防御上获得更多的进展。

youdao