然而奇怪的是，人们对出生在这个月的13号一点也不担心，这恰恰表明我们的迷信是多么不理性。
Yet oddly enough, to be born on the 13th of the month is not regarded with any fear at all, which just shows how irrational we are in our superstitious beliefs.
然而奇怪的是有30 %至40 %的双亲遗弃它们的幼雏。
Curiously, though, in between 30% and 40% of cases both parents desert the clutch.
然而，这样的解释既不能说明这个奇怪的惯例的来源，也不能说明它流行的原因。
Such explanations, however, illuminate neither the source of this curious convention nor the reason for its popularity.
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