放射性活度 fàng shè xìng huó dù

DEFINITIONS

  1. radioactivity

CHARACTERS

放 fàng
HSK 3
put, release, free, liberate
射 shè
HSK 5
shoot, eject, issue forth, emit
性 xìng
HSK 4
nature, character, sex
活 huó
HSK 4
live, exist, survive; lively
度 dù
HSK 4
degree, system; manner; to consider