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一个大原因是……。另一个原因是……。
For one reason... For another reason...
youdao
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为什么会…？一个原因是…，另一个原因是…；或许其主要原因是…
Why did …? For one thing …, for another …perhaps the primary reason is …
youdao
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为什么会…？一个原因是…，另一个原因是…；或许其主要原因是…
Why did …? For one thing …, for another …perhaps the primary reason is …
youdao