How long did it last 持续了多久
How long did it take for extra names to develop into last names?
额外的名字发展成姓氏需要多长时间？
youdao
If so, then consider yourself lucky! But how long did it last?
如果是这样，那么你会觉得自己多么幸运！
But how long did it last?
但它持续多久了？
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