相比以前所使用的一些根据恒星重力引起的震动来探测行星的方法，凌日探测法可以发现体积小很多的行星。
Transit detection can pick up much smaller planets than previous methods based on gravity-induced wobbles in the stellar parent.
根据超声波探测理论，讨论了多脉冲循环法用作非接触式流量检测的原理。
According to the theory of ultrasonic inspection, the principle of flow inspection using multi pulse circulation method was discussed.
根据超声波探测理论，讨论了多脉冲循环法用作非接触式流量检测的原理。
According to the theory of ultrasonic inspection, the principle of flow inspection using multi pulse circulation method was discussed.
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