下寒武

lower Cambrian (geological period approx 530 million years ago)

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

cold / poor / to tremble

surname Wu

martial / military

lower Cambrian series (geological strata from approx 530 million years ago)