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( Ex: 好 ou 你好 ou 花好月圆 )
线
yǐ zhǒng shè xiàn
乙种射线 yǐ zhǒng shè xiàn
放射性物质衰变时,放射出来的乙种粒子流,有穿透能力,能穿透几厘米厚的铝板,并能使气体电离,使照相胶片感光。也叫“β射线”
More about 乙种射线 characters :
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