For the ideal gas, we know that u is volume independent.
对于理想气体,我们知道u与体积无关。
Respectively calculate different sizes and U-value of window's structure of different opening style to be an ideal basis for choosing the best input-output ratio.
分别计算不同尺寸及开启方式的窗结构U值，作为选择最佳投入产出比率的理想依据。
It passes through the history of U. S. a and represents the lifestyle of Americans and the ideal of national spirit which influence each American.
美国梦贯穿美国历史，最能体现美国人的生活方式和国民精神的理想，影响了每一个美国人。
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