a 和ha中的a相同
as the a in ha

o 英语中没有与之类似的音。发o时，口半闭，舌位半高，舌头后缩，唇拢圆，声带振动。
There is no similar sound in English .To pronounce this sound,half open the mouth, raise the tongue backwards to a mid-high position,round the lips and let the vocal cords vibrate.

e 和lotus中的u类似
like the u in lotus

i 和liter中的I相同
as the i in the liter

u 和crucial 中的u相同
as the u in crucial
er 发音时，舌位居中中，稍后缩，不圆唇，同时舌尖向后卷起。
To make this sound,place the tongue in the middle and draw it back slightly in the unrounded mouth , and curve the tip of the tongue backwards.