The Dai now live in the borders of tropical Vietnam and Laos, but their legends tell of how their ancestors came here by following the rivers from mountain lands in the cold far north.
傣族人现在居住在与越南以及老挝接壤的热带地区，他们的传说讲述了先辈是怎样来到这儿的从寒冷而又遥远的北方山区顺流而下。
Under more primitive circumstances, such as those that prevail in many of the tropical lands, rice growing is an exceedingly laborious and time-consuming hand operation.
在比较原始的环境中，例如在许多热带地区普遍存在的那类环境，水稻种植是一种非常费力费时的手工作业。
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