【医】正电子湮灭能量

positron annihilation positron annihilation positron emission positron decay particle annihilation annihilation gammas energy fight a war of annihilation energy flow metabolizable energy zero energy positron-annihilation energy positron-electron annihilation positron-annihilation apparatus positron annihilation radiation electron-positron annihilation high energy positron positron-decay energy annihilation radiation