Tiv thaiv koj cov cuab yeej nrog peb qhov kev ua tau zoo tua nyuj , engineered los muab tsis tseem tiv thaiv force nkag, xauv xaiv, thiab tawm tsam lub cev . Muaj nyob rau hauv ib qho thiab ob tog hluav taws xob teeb tsa , cov xauv cua hnyav uas xa mus tom ntej-qib kev ruaj ntseg rau cov chaw nyob thiab cov ntawv thov ua lag luam.
Tsis muaj cov khoom pom