Her son used sign language to tell her what happened.

她的儿子用手势语告诉她发生的事情。

《柯林斯英汉双解大词典》

They communicated in sign language.

他们用手语沟通。

《牛津词典》

All our staff have been instructed in sign language.

我们的员工都接受过手语训练。

《牛津词典》

She has studied the social meaning of American Sign Language as well as the Al-Sayyid Bedouin Sign Language in Israel.

VOA: special.2010.10.01

And human language uses this amazing trick described by Ferdinand de Saussure, the great linguist, as "The arbitrariness of the sign."

人类语言使用这些,被语言学家费迪南德·德·索绪尔,称之为"符号任意性"的神奇把戏

耶鲁公开课 - 心理学导论课程节选

In the first passage, the statement about language by criticism, that sign and meaning can never coincide, is what is precisely taken for granted in the kind of language we call "literary."

在第一段，关于语言的主张，用批判的方式，认为符号和意思永远不能相矛盾，正是这个主张,被人们认为是理所当然的，对于我们所说的文学语言来说“

耶鲁公开课 - 文学理论导论课程节选

Americans on the other side of the border were the intended audience for the English-language sign, then-President Felipe Calderon said at the time, saying an increase in violence in Mexico was directly connected with the 2004 expiration of the U.S. assault weapons ban.

CNN: Mexico eyes U.S. gun policies, hopes for shift

How many sign language interpreters are there who, like Callis, specialize in sign language interpreting?

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

Currently, there is a national shortage of sign language interpreters in the United States, even though there are 40 schools offering bachelor degree programs in American Sign Language (ASL) interpreting and 78 that offer associate degrees.

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