Arch test method is characterized with briefness, economy, it also can be validated by other methods, so, it is widely used in the measurement of RF absorbing materials.

由于拱形法简捷、经济，又可以用其他方法加以验证，所以在射频吸波材料测量中得到广泛的应用。

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The test consists of placing the bottom of a foot in water, then stepping on a paper bag or some other object that will show how high or flat a person's arch is.

测试要先把脚底浸湿，然后踩在纸袋或其它可以显示你足弓高度的物体上。

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High-level ARCH effect is certification in the BDI logarithm process by ARCH LM test, GARCH(1,1)model is used to eliminate the conditional heteroscedasticity.

通过ARCH LM检验认为BD I对数序列存在高阶ARCH效应，并用GARCH（1，1）模型消除残差序列的条件异方差性。

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Earlier this year, Tehran's arch-enemy Israel test fired its own Arrow 2 missile in a simulation of stopping the Shahab-3.

VOA: standard.2009.09.28

Snapping at Boeing's heels is its arch rival Airbus, which is expected to start test flying its A350 XWB later this year.

CNN: Can the 'game-changer' still live up to its name?