1, Kev Siv: Feem ntau hais lus, cov hluav taws kub hnyiab hauv av yuav raug ntsia rau hauv qhov chaw pom tseeb saum av, yog li thaum muaj hluav taws kub, cov hluav taws kub hnyiab tuaj yeem pom thawj zaug kom tua hluav taws. Thaum muaj hluav taws kub ceev, koj yuav tsum qhib lub qhov rooj hluav taws kub thiab ...
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