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词语霜期拆分为汉字：
霜字的拼音、笔画、偏旁部首、笔顺、繁体字，霜字字源来历，霜字演变
附着在地面或植物上面的微细冰粒，是接近地面的水蒸气冷至摄氏零度以下凝结而成的：～降。～冻。～序（指深秋季节）。～秋。～期。～天。像霜一样的东西：柿～。西瓜～。形容白色：～鬓。～刃。～锋。喻高洁：～操（高洁的节操）。～骨。～情。……
期字的拼音、笔画、偏旁部首、笔顺、繁体字，期字字源来历，期字演变
1. 期 [qī]2. 期 [jī]期 [qī]规定的时间，或一段时间：定～。限～。～限。学～。量词，用于刊物或其他分期的事物：第五～。盼望，希望：～望。～冀。～盼。～待。限度：“征敛无～求索无度”。必，决定：“～死，非勇也”。〔～颐〕指人……
汉语拼音：shuāng qī
Northern Alberta is mostly covered by boreal forest and has fewer frost-free days than southern Alberta due to its subarctic climate.
北阿尔伯塔主要是涵盖寒带森林，并减少无霜期天，比艾伯塔省南部由于其亚北极气候。The research of the evolution principle of frost-free period would give climate resources support for risk decision making in agriculture.
研究无霜期演变规律，为农业风险决策，趋利避害充分利用气候资源提供气候依据。Early frost damage reduced by 80%. Frost period variation increased the heat resources.
霜期提前、推后、无霜期延长使农业生产的热量资源增加。September to May the following year as the frost period, frost-free period is short, significant differences between north and south.
九月至次年五月为霜冻期，无霜期短，南北相差悬殊。Change at the annual frost-free period 100-160 days, the distribution of the trend of growing on the grounds east to west.
全年无霜期变化在100—160天之间，分布趋势为由东向西逐渐增长。The frost-free period lengthened, and the frost period shortened.
无霜期天数增加，霜期缩短。Cold, snow and windy weather are key points to defense in frost period.
低温、积雪和大风灾害天气是霜期设施农业的防御重点。Is a long frost season crops grow long.
霜期长则作物的生长期也长。The striking characteristics include: cold in winter and short frostless season;
突出的特点是冬季寒冷，无霜期短；