达尔文要说的进化论内容源自于此，也终结于此。
What Darwin had to say about evolution basically begins and ends right there.
中国现存地名和历史地名直接源自于此的，其实也有很多。
Actually, many existing or historic place-names in China directly derive from them.
米歇尔说，“我们首先是朋友，其他的关系都源自于此。”
Says Michelle Obama, "Our relationship was first a friendship."
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