gamma ray
gamma-ray的词性:n.(名词)
1. Electromagnetic radiation emitted by radioactive decay and having energies in a range from ten thousand (104) to ten million (10 7) electron volts. 伽马射线:辐射性衰变放出的电磁射线,并在1万(104)至一千万 (10 7)电子的范围内具有能量