they used to be enough

They know enough to know that the country in which they grew up is changing, and they'll do whatever they can to reverse those changes and return the cultural landscape to what it used to be.

他们知道的足以使他们明白，他们生于斯长于斯的国家正在发生变化，他们会尽一切可能来扭转这些变化，并试图将人文景观恢复到它曾经的样子。

Soyuz capsules are used to ferry crew to and from the orbiting platform, and enough vehicles are always present so that they can be used as "lifeboats" if an emergency arises.

联盟号飞船用于在地球和轨道之间运输航天员，而且经常保持充足的数量，因此当危险发生时，它们可以作为“救生船”使用。

But a powerful beam of subatomic particles could be used to crush nuclei together strongly enough so they fuse.

而强大的亚原子粒子束可以用来粉碎原子核，其强烈程度足以使它们融合。