Dab tsi tsoos tsho pa ncho ua

Hauv kev hnav khaub ncaws hnav khaub ncaws, cov ris tsho pa hluav taws xob tau tshwm sim los ua cov txiaj ntsig tsis tau, muab ntau cov txiaj ntsig kev pab cuam tshuam yooj yim wrinkle tshem tawm .

Firstly, ib tug tsoos tsho tso pa tawm ntawm cov pob txha thiab cov ntaub so kom rov qab los rau hauv cov hmoov av, los ntawm cov ntaub so kom rov qab los rau hauv cov hmoov av, ua kom cov khaub ncaws zoo nkauj

Ntxiv mus, nws ua haujlwm ua lub zog muaj zog . Cov khaub ncaws loj tuaj yeem tshem tawm cov khaub ncaws siab dua ntawm cov khaub ncaws, tshwj xeeb yog cov khoom uas qhuav - ntxuav kom qhuav -.

Lwm qhov zoo dua yog tias nws tuaj yeem pab refore cov duab ntawm cov ris tsho thiab rov kho dua tshiab ntawm cov ntaub, ua kom yooj yim rau kev tswj hwm cov khoom zoo thiab rov ua kom zoo nkauj thiab cov khaub ncaws zoo nkauj {4}