由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
水痘主要发生在冬季和春季，但随时可能发生的一年。
Chicken pox occurs mostly in winter and spring, but can happen any time of the year.
类蛋白荧光峰的强度在年初冬季和春季开始升高，夏季达到最高。
Protein-like fluorescence peak intensity began to increase in early winter and spring, and the summer reached to the peak.
利用粪便显微组织分析法对陕西凤县野生林麝冬季和春季的食性进行了研究。
Diet composition of forest musk deer Moschus berezovskii in winter and spring was studied by using a method of micro histological analysis of feces.
2004年的冬季和春季，麻省理工学院都市研究与计画系参加了关于中国佛山的研究所规划研习。
In the winter and spring of 2004, Massachusetts Institute of Technology (MIT) Department of Urban Studies and planning students participated in a graduate planning workshop on the Foshan, China.
H7N9禽流感病毒可能大多发生在冬季和春季，中国首次报道人类感染禽流感是在2013年三月份。
H7N9, a bird flu strain most likely to strike in winter and spring, was first reported to have infected humans in China in March 2013.
经过分析和比较表明，该地区总悬浮颗粒物(tsp)和飘尘对大气的污染相当严重，飘尘占tsp的比例偏大，飘尘的颗粒分布在冬季和春季相似。
The results indicate that the air of the district is contaminated seriously by the total suspended particles (TSP) and the floating dust.
在该地区的局势可能会变得非常重要，如果气温进一步下降这个月和春季干旱，冬季一后，粮农组织说。
The situation in the regions could become critical if temperatures dropped further this month and a spring drought followed the winter one, the FAO said.
冬季是温带，秋季和春季阳光充足和提供明确的天，夏季提供雾清晨和阳光，凉风习习的下午。
The winter months are temperate, fall and spring offer sunny and clear days, and the summers provide foggy early mornings and sunny, breezy afternoons.
年变化，夏季和春季的热岛强度明显大于冬季的热岛强度。
The spring and summer heat island intensity in chongqing is significantly higher than the winter's.
年变化，夏季和春季的热岛强度明显大于冬季的热岛强度。
The spring and summer heat island intensity in chongqing is significantly higher than the winter's.
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