third, by using dong and chinese to do the coding and decoding during the english teaching, this trilingual teaching mode can greatly improve the efficiency and quality.
其三,这种三语教学模式利用侗语和汉语完成英语教学过程中的编码和解码,可以大大提高教学效率和质量;
fifth, the trilingual teaching of english-dong-chinese has its limitations in nationalities, regions, the language mastering degrees and learning stages.