谁将成为第一万个访问者？
粗略的估计一下，她会是您的第一万代曾祖母。
She was, by one rough estimate, your 10,000th-great-grandmother.
事实上，这里有两个时期的降雨和湖泊形成：第一个始于大约37000年前；而第二个可以追溯到约一万年前。
There were actually two periods of rain and lake formation: the first one began about 37,000 years ago; and the second one dates from about 10,000 years ago.
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