南方很多地方是梯田，這種機械化收割很困難。美國的地理條件要好得多，適合機械化耕作。

來源: 衡山老道於 2020-12-31 04:32:47 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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