单词	activity decay
释义	activity decay 射性衰变
随便看	origins origins.com origin server origins of dance origins of life origins of value functions origin station origin stop origin subarea field origin subport address origin switch origin system origin.table origin time origin time of earthquake origin vector origin year origional origlio origlion orignal orignation orignation isc point code Origny-en-Thiérache Origny-le-Sec 沟里拾柴，挠上来没一个有好下水的没一事不可对人言没三顿饱饭，有三顿饱气没下场没下马，先敬酒没丝都有寸没主心骨没了头的苍蝇，乱撞一气没了王屠，连毛吃猪 close game close play closer closet close-up closing cloth cloth clothoid cloud