单词	射源衰变
释义	射源衰变source decay
随便看	beginning of cycle (fuel cycle) beginning of eclipse beginning of file beginning of file label beginning-of-file label beginning of file，bof beginning-of-information beginning-of-information marker beginning-of-information marker，bim beginning of life beginning of lunation beginning of message beginning of month beginning of morning twilight beginning of partial eclipse beginning of program beginning of program, program start beginning of program，program start beginning of record beginning of record--bor beginning of record，bor beginning of regeneration-cutting beginning of sequence selection beginning of simultaneous sequences beginning of spring