...限元；热传导；日较差 [gap=1261]Key words:the aqueduct;finite element;thermal conductivity;day difference in temperature ...
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In the Sahara, the difference in temperature between the day and the night is pretty big.
在撒哈拉沙漠，昼夜温差很大。
Cold winter, cool in summer, big temperature difference between day and night.
冬季寒冷，夏季凉爽，昼夜温差大。
The pressure gradient and the difference in temperature between day and night were often the key obstacles to meet the requirement of standard laboratory animal facilities.
梯度压差和日温差是影响实验动物科技设施环境条件达标的关键。
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