For example, she"never knew which came first, the Greeks or the Romans."
例如有这样一桩有趣的事……「她永远弄不清楚，是先有希腊，还是先有罗马。」
Which came first, black holes or galaxies?
是先有黑洞呢？还是先有星系？
Which came first, the quasar or the galaxy?
类星体和星系哪一个形成在前呢？
Which came first, the eggs or the algae?
卵或藻类，何者在前？
Which came first, the eggs or the algae?
卵或藻类，何者在前？
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