The universe, though, is an ancient place, so many civilisations could be very old indeed.
不过宇宙是一个足够大的地方，很多文明可能比我们想象的还要老。
Kissing is considered to be an ancient human interaction, as old as humanity itself.
亲吻，被认为是远古的人类互动形式，其年代和人类本身一样久远。
This open cluster is particularly ancient, estimated to be nearly one billion years old.
这个疏散星团尤其古老，据测算有十亿岁了。
This open cluster is particularly ancient, estimated to be nearly one billion years old.
这个疏散星团尤其古老，据测算有十亿岁了。
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