ua raws li daim ntawv cog lus ", ua raws li cov kev xav tau ntawm kev ua lag luam, koom nrog thaum lub sij hawm kev sib tw ua lag luam los ntawm nws cov kev ua tau zoo tshaj plaws raws li muab kev pabcuam ntxiv thiab tshwj xeeb rau cov neeg siv khoom kom lawv tig los ua tus yeej tseem ceeb.