Ib tug ntawm cov loj tshaj tej yam uas cov neeg yuav dread thaum lub sij hawm lawv cov hnub rau ib hnub lub neej yog muaj ib qho teeb meem nrog rau lawv cov tsheb. Peb cia siab li ntawd, hnyav ncawv rau ntawm lawv hais tias thaum ib yam dab tsi mus tsis ncaj ncees lawm nws yuav xav tias yog li txhua yam tau tuaj mus rau ib tug nres. Qhov zoo ces