| 1. | Polar curve - a graph showing the performance of a wing based on it ' s airspeed and sink rate
滑降比特性曲线用图表显示飞行伞飞行对空速度及沈降率基本特性。
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| 2. | The curve plotted in this way would meet the boundary conditions given and all the polar curves embodied the same wrapping angle
这一方法不仅保证了绘制的型线有给定的边界条件，同时保证了各型线有相等的包角。
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| 3. | The angular extent in a specified plane which contains all the radius vectors of the polar curve of luminous intensity having lengths greater than a specified fraction of the maximum
在某一平面上，一定角宽范围内所包含的光强极轴曲线上的矢径长度均大于其最大值的某一特定比例，这种情况定义为光束的发散。
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| 4. | Three kinds of chemical reaction model are used to describe the chemical processes of downstream of detonation waves . the conditions that planar standing oblique detonation waves may occur and the factors that may affect them are discussed detailedly . the polar curves of oblique detonation waves and " standing window " are computed under different conditions
建立了平面驻定斜爆轰波特性分析的数学模型，采用三种化学反应模型来描述爆轰波后的化学反应过程，详细分析了平面斜爆轰波的驻定条件及其影响因素，计算了不同条件下斜爆轰波的极曲线和“驻定窗口” 。
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