frost-free growing season
... 无霜冻 free of frost 无霜期 frost free period; frost free season; frost-free days (period); frost-free growing season; frostfree season; frost-freedays（period）; frost-proof date; frostless season; period of frost free 无霜日 day free of frost; day without frost ...
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frost-free growing season
无霜冻生长季节
以上为机器翻译结果，长、整句建议使用 人工翻译 。