Cov qauv niaj hnub ua tau zoo, dense lamellar qauv, du, tsis yooj yim rau kev ua tau zoo, tsis yooj yim rau kev tsoo ntug thiab fawm, tsis yooj yim tawg.Peb tau koom nrog hauv kev tsim khoom thiab kev lag luam hauv txhua yam ntawm cov khoom ntoo suc ...
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