Power says manual alphabets from Austria, France and Spain could be traced back to one-handed manual alphabets from 16th- and 17th-century Spain.

鲍尔表示，奥地利、法国和西班牙世系中的手语字母可追溯到16世纪和17世纪西班牙的单手手语字母。

Surprisingly, the Austrian manual alphabet influenced sign languages as far away as Russia.

令人惊讶的是，奥地利手语字母的影响远至俄罗斯。

And the British lineage, which uses a two-handed manual alphabet, eventually made it to Australia, New Zealand and India.

而使用双手手语字母的英国世系，最终传到了澳大利亚、新西兰和印度。

So a manual alphabet is sort of a subsystem within a sign language that is used to represent a written language.

手语字母是符号语言中的子系统，而符号语言用于代表书面语言。

Power's team chose to study manual alphabets because a record of them exists going back to the late 16th century in Europe.

鲍尔的团队选择研究手语字母，是因为欧洲有一份可追溯到16世纪晚期的记录。

Now she studied the different ways to teach the manual alphabet.

现在她研究了教手写字母表的不同方法。

Some of the girls learned the manual alphabet so they could talk to Helen.

一些女孩学会了手写字母， 这样她们就可以和海伦交谈了。