Sometimes if they didn't know the meaning of a word, but knew the sign for that word then it would be very easy to deduce the meaning of the word, since most signs had very obvious meanings.

有时，你没有学过某个单词，不懂得它的意思，但手语的意思却很容易令人明白。 因为，肢体语言往往是一种“世界通用”的语言，很多手语是很直接的，一目了然的。

youdao