It's not like we just stumbled upon this subject.
它不象我们在这个问题的上的止步不前。
There are good reasons for the difference, although we almost certainly stumbled on them accidentally.
这种差异存在着充分的理由，尽管我们偶尔会感到迷惑。
There are good reasons for the difference, although we almost certainly stumbled on them accidentally.
这种差异存在着充分的理由，尽管我们偶尔会感到迷惑。
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