Kev paub
-
11
Jul
Xaiv kev hnav khaub ncaws raws qhov ntsuas qhov txhabThawj qhov kev kho qhov txhab yuav tsum yog daim ntaub thiab zaj duab xis; qhov txhab yuav tsum yog zaj duab xis nyias
Ntau -
09
Jul
Kev hnav khaub ncaws ua haujlwm lom (kaw hnav)Kev hnav khaub ncaws yog kev hnav khaub ncaws ua ke ua los ntawm cov ntaub ntawv polymer thiab cov khoom siv roj ntsha los ntawm cov txheej txheem thev naus laus zis siab.
Ntau -
30
Jun
Cov Khoom Uas Ruaj NtsegNws yog qhov tsim nyog rau kev kho pob txha kho pob txha, kho kom deformity, ua kom lub cev tsis ruaj khov, mob ntsws pob txha, mob qog nqaij hlav hauv pob txha thiab pob txha caj dab kho pob qij txha
Ntau