一个英语谜语

问题描述:

一个英语谜语
A riddle
Without a voice I speak,I'm small,light and fleet,
I express other's thoughts,and travel without feet.
各位大仙,帮帮忙!急用!

没有声音会说话,小巧、轻便又快速.
别人思想我传达,没有腿我四处走