Dab tsi yog 1.5 teev steel tua hluav taws?

"1.5 teev" Kev Ntsuas Hluav Taws Xobyog muab rau kev sib dhos muaj xws li ntau cov ntaub ntawv hauv tsev uas tuaj yeem tawm tsam ntawm qhov qauvtso tsegRaug rau 1.5xuab mooCov. Nws tau tsim los ntsuas qhov ua tau zoo ntawm kev ua haujlwm hauv tsev thaum lub zogtso tsegnphav