Very often, negotiations depend on setting conditions.

常常，谈判取决于设定的条件。

And this is an investment in setting the conditions for effective deterrence and defense of our NATO allies, especially those on the eastern flank of the alliance.

这是为有效威慑及保卫我们北约盟国, 尤其是在联盟东部国家做好准备的一种投资。