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Alpha particles are these helium nuclei, and they are the result of radioactive decay. 阿爾法粒子是氦核,它們是放射性衰變的産物。
The first type discovered -- alpha decay -- is when a radioactive particle emits a Helium nucleus ! 我們發現的第一種衰變方式——阿爾法衰變——是放射性粒子産生氦分子!
As radon progeny decay, they emit radioactive alpha particles and attach to aerosols, dust and other particles in the air. 氡子核在衰變時發射出放射性阿爾法粒子,這些粒子可附著於空氣中的浮質、灰塵及其它粒子。
原聲例句
Alpha particles are these helium nuclei, and they are the result of radioactive decay. 阿爾法粒子是氦核,它們是放射性衰變的産物。 麻省理工公開課 - 固態化學導論課程節選