a descent of temperature 温度的下降
The descent of the temperature is so great that many people catch a cold.
气温下降如此之大，许多人都感冒了。
As the crystal grows around that speck, its shape is altered by humidity, temperature, and wind; the history of a flake's descent to Earth is recorded in its intricate design.
晶体在那个小颗粒周围扩展之时，其形状会因湿度、温度和风力的差异而不同，雪花降落于地球上的历史记录在其错综复杂的设计上。
Drying temperature of paddy is the main factor that make rice taste descent.
试验结果表明，干燥温度是导致稻米食味下降的主要因素。
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