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alpha particle ['ælfə'pɑ:tɪk(ə)l]
phys.	α粒字 (あるへぁ・りゅうし)
radiol.	α［アルファ］粒子 (α-ryūshi)
n alpha particle | n ['ælfə'pɑ:tɪk(ə)l]
gen.	α粒子 (α・りゅうし); アルファ粒子 (arufa-ryūshi)