士兵们被授权开枪，但仅作为最后的手段。

Soldiers were given the authority to shoot, but only as ___a ___last ___resort.

强迫孩子以某种方式相信应该只在讨论和说服之后作为最后的手段使用。

Forcing a child to believe in a certain way should be used only as ___a ___last ___resort, after discussion and persuasion.

外交总是首选；军事行动是最后的手段。

Diplomacy is always preferred; military action is ___a ___last ___resort.