ultrasonic wave test的用法和樣例：
例句
- By sweeping a laser along the pipe to change the local wave speed, physicists might be able to create a horizon.
將雷射沿著(zhù)管路掃過(guò)，可以改變局部的波速，運用這種方式，物理學(xué)家也許可以創(chuàng )造出視界來(lái)。 - The peak of the wave celerity probability distribution appears within the mean velocity region of the two-phase bubbly flow.
空隙率波的波速概率分布在兩相混合流速處出現峰值，向兩側加速遞減，與高斯分布接近。
