放射性計時

radiometric dating

to put / to place / to release / to free / to let go / to let out / to set off (fireworks)

to radiate / radioactive

old variant of 射[she4]

to shoot / to launch / to allude to / radio- (chemistry)

radioactive

nature / character / property / quality / attribute / sexuality / sex / gender / suffix forming adjective from verb / suffix forming noun from adjective, corresponding to -ness or -ity / essence / CL:個|个[ge4]

surname Ji

to calculate / to compute / to count / to regard as important / to plan / ruse / meter / gauge

to measure time / to time / to reckon by time

o'clock / time / when / hour / season / period