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秋天过去了,昆虫就要过冬了,这时候的昆虫表面上与往常一样,其实,昆虫的身体内部已发生了很多生理变化。这时,昆虫积累了大量的脂肪和营养物质,以度过漫长的越冬期;并减少身体里水分的含量,余下水分大多以结合水(另一部分为游离水)的形式贮存于体内,结合水在零下32摄氏度也不会结冰;同时,天气变冷的时候,昆虫会向暖和的地方迁移,即具有趋温性,以适应严寒的冬天。
When the autumn passed, the insects would have been overwintering. At this time, the insects were on the surface as usual. Actually, many physiological changes have taken place inside the insects' bodies. At this time, insects accumulate a large amount of fat and nutrients to survive the long wintering period and reduce the body's moisture content. Most of the remaining water is stored in the body in the form of bound water (the other part is free water) At minus 32 degrees Celsius will not freeze; the same time, when the weather is cold, the insects will migrate to a warm place, that is, with the warmth to adapt to the cold winter.