If everyone in your class ?including the teacher ?knows the spelling and meaning of a word but is mispronouncing something as simple as a vowel sound it could make you all indecipherable.

• 如果在你课堂的每一个人-包括你的老师-知道拼音及字汇的意思但是错误的发音就像是母音那会让你完全难以理解。