Some sign languages are very sophisticated means of communication.
一些手势语是非常复杂的交流方式。
Sign languages can be used in different manner.
手语的运用有不同的方式。
The third form is sign representation, i. e. the various languages of human.
第三重形式是符号表达形式，其表现是人类的各种语言。
If you have no background in other languages, consider taking sign language classes.
如果没有其他语言背景，你可考虑参加手语班。
If you have no background in other languages, consider taking sign language classes.
如果没有其他语言背景，你可考虑参加手语班。
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