... frost formation 结霜 frost free season 无霜期 frost level indicator 结霜液面的指示管 ...
基于26个网页-相关网页
frost-free season 无霜季
length frost-free season 无霜期长度
The Frost-Free Season 无霜期
length of frost free season 无霜期间
frost-free growing season 无霜期
frost free season
无霜期
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Over centuries, Manchurian ancestors lived in Northeast China of short frost-free season with fishing and hunting being their main economic sources instead of planting.
满族先祖长期生活在无霜期短的东北，初以少种植、多渔猎为主要经济来源。
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