thời gian chu kì 
cycle time [ thời ] : time(s), era
[ gian ] : (1) dishonest, underhanded, tricky; (2) apartment, room; (3) difficult, hard; (4) danger, peril
[ chu ] : see châu
[ kì ] : to rub off, rub out
Most Common Compounds Set 1:
Most Common Compounds Set 2 :