渐衰期
6.The absorption half-life of TC in muscles was 8.593 h and the elimination half-life was 23.50 h,and OTC were 8.261 h and 22.979 h,respectively.
8.The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay.
9.We can talk about the half-life of a radioactive isotope, and indeed we can measure and state very very precisely what that half-life is.
10.The half-life of these firework-related particulates from a subsequent event, midnight of the Chinese Lantern Festival,was about 2.4 h.
