Txij li thaum tsim cov phau ntawv phau ntawv sau, ntau thiab ntau tus neeg siv rab chais tso pov tseg kom chais. Hauv lub xyoo pua 21st, tus nab npawb rab chais tau siv los ntawm tib neeg txhua xyoo tau tshaj 7 billion.
Tom qab ntau tshaj 100 xyoo ntawm kev txhim kho, thev naus laus zis ntawm rab chais yog ntau dua thiab paub tab. Muaj ntau txheej ntxiv rau ntawm cov hniav, koj tuaj yeem pom rab chais los ntawm ib rab hniav mus rau xya hniav. Feem ntau muaj cov hniav ntau dua, kev ua haujlwm zoo dua shaving thiab kev ua haujlwm zoo dua koj yuav muaj.
Sib piv nrog rab chais uas peb tab tom siv, muaj cov thev naus laus zis tshiab ntawm cov hniav qhib qhib tau maj mam nrov nyob hauv cov neeg niaj hnub no. Nws yog kev hloov pauv tshiab ntawm rab chais pov tseg. Muaj qhov sib txawv nyob hauv nruab nrab ntawm cov hniav; qhov sib txawv yuav tsum tsis loj heev, uas yuav txo qis kev nplawm. Los yog dhau los ntawm qee qhov tshuab tshwj xeeb, dej tuaj yeem yooj yim ntxuav tawm cov hwj txwv, plaub hau thiab dander ntawm cov hniav.
Vim li cas peb thiaj yuav tsum tau ua rab chais plaub hau zoo li no uas tuaj yeem ua rau cov plaub hau? Hom tshiab ntawm rab chais hniav tuaj yeem yooj yim ntxuav tawm cov hwj txwv, plaub hau thiab dander nyob nruab nrab ntawm cov hniav, thiab tiv thaiv cov hniav los ntawm kev xeb. Rab chais tuaj yeem siv sijhawm ntev. Yog tias koj cov hniav zoo txaus, rab chais tuaj yeem siv tau 10 zaug, 15 zaug lossis ntau zaus.
Lub caij no, cov plaub hau, plaub hau, dander thiab kev hlub nyob nruab nrab ntawm cov hniav yuav ua rau tawv nqaij. Lawv tau muab zais rau hauv cov hniav thiab yooj yim rau yug cov kab mob. Tam sim no cov txheej txheem tshuab tshiab no tuaj yeem ntxuav cov av sab hauv. Nws yog kev tu cev ntau dua.
Los ntawm kev xav ntawm kuv tus kheej siv, qhov qhib-ntws bladerazor tuaj yeem ua rau kuv tsis chim siab. Thaum kuv siv rab chais hniav ib txwm siv, kuv tsoo lub raj mis thiab tuav cov hwj txwv tawm, tom qab tseem muaj 1 lossis 2 tus txhuam hauv nws, kuv yuav chim siab heev. Yog lawm, qee tus neeg uas nyiam hom no ntawm pob thiab pom nws nthuav heev.
Ib qho ntxiv, vim tias hom rab chais no tuaj yeem siv tau ntau lub sijhawm, nws txo qis qhov hloov pauv, uas yog ib puag ncig zoo dua thiab txuag nyiaj ntau dua.
Cov cuab yeej siv rab chais yog ntau dua thiab paub tab. Peb cia siab tias yuav muaj thev naus laus zis tshiab los siv rau rab chais, thiab cia siab tias yuav siv thev naus laus zis zoo tuaj yeem siv rau txhua yam hauv peb lub neej.
