He fled to Costa Rica to avoid military service.他逃到了哥斯达黎加以逃避服兵役。The Swanhilda cast off from the docks at Port Costa.“斯万希尔黛号”从可斯达港的码头解缆开船.Here, a female floats through a cloud forest in Costa Rica.这里, 一雌性漂浮物通过云雾林在哥斯达黎加....
Multileaf collimator ( MLC ) is the indispensable equipment of IMRT.作为IMRT的必备设备,电动多叶光栅 ( MLC ) 有着举足轻重的作用.Training simulator system for photoelectric collimator is designed for the manual operation of photoelectric collim...