单方面制裁并不是改变一个国家的行为的有效办法。

Unilateral sanctions have not proved to be an effective way to change a country's behavior.

youdao

他们把这看作是欧盟的单方面行为，并且具有潜藏的不合法性。因为，也许欧盟这一做法是对其他国家航空公司越权管辖。

They see it as unilateral and potentially illegal because it may assert extraterritorial jurisdiction on carriers from other countries.

youdao