Constanty康斯坦蒂constantadj.不变的；经常的n.常数；恒量constant feed weigher定量供料秤,定量给料秤constant coefficients常系数Constant exophthalmos恒定性突眼constant altitude PPI等高平面位置指示器constant power factor恒功率因数constant rising slope恒定上升斜率constant slip machine恒滑式磨耗试验机constant engine speed发动机恒转速constant -threshold固定阈值constant speed engine恒速发动机

1. But ordinary xenon lamps flame unstably, then one or several data points can be sampled during a single flash.Tens of flashes are needed to achieve a whole test.
   但一般频闪氙灯的光强不恒定，单次闪光一般只能采集一到几个测试数据，故一次测试需要至少闪光几十次。