Covqhob tov khoomtuaj yeem ua tiav kev sib xyaw ua haujlwm siab thiab yog cov khoom siv sib xyaw ua haujlwm.Advanced tov khoom tsim txhim kho kev sib xyaw ua haujlwm, txo cov khoom sib xyaw ua haujlwm siab, thiab txhim kho cov khoom ntseeg tau.
Post lub sij hawm: Dec-12-2018