The Bell X-5 gave NACA and Air Force researchers a chance to test out variable-sweep wings.
在贝尔x - 5和空军赋予的NACA研究人员一个机会来测试可变后掠翼。
The second Part is about the exPression of Average stutistics. values for stationary chance variable and its terms concerned.
第二部分是有关平稳随机变量均值的函数表达式及其有关术语。
This is a chance variable, and is not convenient to use in practice.
这是一个随机变量，在实际中不便使用。
This is a chance variable, and is not convenient to use in practice.
这是一个随机变量，在实际中不便使用。
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