Voice communication, including the level of sound , syntax and vocabulary words to use to make recommendations;

语音交流包括对声音高低、说话的语法和词汇使用提出建议；

youdao

Voice communication, including the level of sound , syntax and vocabulary words to use to make recommendations;

语音交流包括对声音高低、说话的语法和词汇使用提出建议；

youdao