They also used ultrasonic scanning to measure the sliding motion of the Achilles tendons of their volunteers as their feet moved up and down.
同样，他们还使用超声扫描，测量这些志愿者样本脚部上下移动之时跟腱的滑动。
2
The unified mode can be decomposed into strip-map mode, spotlight mode, sliding spotlight mode and beam scanning mode, and each correspondingly has a simplified 2-d data collection equation.