全部

1·Since Helen was deaf and blind, she learned to communicate via a manual alphabet.

自从Helen不幸地失明和失聪后，她学会了用手语字母表交流。

2·If I could see only one play, I should know how to picture in my mind the action of a hundred plays which I have read or had transferred to me through the medium of the manual alphabet.

如果我哪怕只能看一部剧，我也会知道怎样在心里描绘出一百部剧的动作。这些剧本我全读过，或通过手语字母的媒介向我描述过。