Cov hauv paus ntsiab lus ntawm cov khoom yas
Cov yas-tawv thiab tawv ntawm cov ntaub ntawv yog qhov tseem ceeb raws li lub zog. Cov ntaub ntawv nrog cov yas tsis zoo thiab cov tawv tsis zoo ua rau cov txheej txheem ua haujlwm tsis zoo, uas yog qhov nyuaj kom tau raws li ntau yam kev ua haujlwm thiab kev teeb tsa, thiab kev ua kom tsis tuaj yeem ua haujlwm thaum lub sijhawm ua haujlwm. Qhov kev puas tsuaj no feem ntau tsis muaj kev sib tw ua ntej ntawm kev sib tsoo thiab nws qhov kev phom sij muaj qhov ntau dua. Yield zog qhia tias cov khoom tawg. Cov khoom siv khov kho tsis muaj peev xwm tiv qhov cuam tshuam ntawm cov khoom thauj.