Qhov kub ntawm cov hluav taws xob phuam khib yog qhov kub npaum li cas?

Cov phuam qhwv hluav taws xob yog cua sov ntawm qhov kub thiab txias, thiab qhov kub ntawm qhov chaw nyob nruab nrab ntawm 40-50 degree, uas yuav tsis hlawv khaub ncaws. Nws tuaj yeem qhuav cov phuam da dej, phuam da dej thiab khaub ncaws me me los tiv thaiv kev loj hlob ntawm cov kab mob.