relative distance的用法和样例：
例句
- The directivity of emitter by changing the number and relative location of ultrasonic transducers are simulated.
通过改变换能器数目及之间的相对距离，模拟了超声发射阵的空间指向性。 - The presence of the neighboring boundaries enhances the vesicle velocity, but its dependence on the relative vesicle-wall separation distances is not necessarily to be monotonic.
边界的存在将会加快囊胞粒子泳动的速度，但粒子速度和粒子与边界的相对距离之间并非呈现一单调递增的函数关系。
