H - Beam ntau lawm yuav tsum tau cov cuab yeej siab heev thiab cov nqaj hlau tsis zoo, muaj peev xwm siv ntau dua - qhov kub thiab txias {} Yuav tsum ua kom sov cov hlau billets rau qhov ntsuas kub thiab txias nrog kev tshaj lij, yog ib qho zoo tshaj plaws ntawm kev ua haujlwm me me - tswj .