本文用多元分析法，对46个小麦亲本材料的6个数量性状进行了遗传距离的测定。
The genetic distance for 46 wheat parent materials with 6 quantitative characters is determined by using multivariate analysis.
不过，对测定目标物距离来说，声波运行的速度太慢，因此，声波回声测距法在实用中有其局限性。
Thus this soundwave echo method has its limitation in practical use.
整个场地中挂在的RFID读取机可以测定与特定标签的角度和距离，并将每个表演者对应定位到舞台的某个虚拟网格空间中。
RFID readers mounted throughout the venue can determine the angle and distance from a specific tag and map individual performers to a virtual grid of spaces on the stage.
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