与邻邦保持相对稳定的关系可以作为对美关系的屏障—尤其是在美国缺席很多组织的情况下。
Relatively stable relations with its neighbours act as protection against volatility in relations with the United states-particularly as that superpower is absent from many of the groupings.
这些挡板在压缩空气力量的作用下会竖立起来，从而形成一个倾斜的屏障挡住来自亚得利亚海的洪水。
Compressed air will then force the panels to rise up on their hinges, forming a slanting barrier to the incoming tide from the Adriatic Sea.
在紧急情况下减少苍蝇，蚊子和啮齿类动物可能会很困难，但物理屏障可以用来控制最迫切的问题。
Reducing the numbers of flies, mosquitoes, and rodents quickly in an emergency may be difficult, but physical screens can be used to control the immediate problem.
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