Only in the past 20 years have specialists in language study realized that signed languages are unique—a speech of the hand.

直到最近20年，语言研究的专家们才认识到手语的独特性——一种用手表达的语言。

youdao

Ninety percent of deaf children are born into hearing families, so they get little exposure to spoken or signed language in their early years.

百分之九十的聋儿生在听力正常的家庭，因此，他们在小的时候很少暴露出他们言语发面的弱势。

youdao

Transfers a spoken or signed language into another spoken or signed language, usually within a limited time frame in the presence of the participants.

口译将口语或符号语言翻译成另外一种口语或符号语言，通常在规定的时间内与参与者共同出席并完成所要求的翻译。

youdao

One group, InterpretAmerica, holds an annual summit for both spoken and signed language interpreters.

FORBES: Lydia Callis and the Biggest Industry You've Never Heard Of

The contract may be oral, or it may be written in the local language and signed by the chief.

ECONOMIST: No title

The committee said the government department ignored warnings about how complex the work was before it signed a five-year deal with Applied Language Solutions, which has now been acquired by the company Capita.

BBC: Statue of Justice