Their function and meaning are completely unknown.
它们的功能和意义是完全陌生的。
To me, it's just like listening to a language completely unknown.
对我来说，就像在听一种完全不懂的语言。
You must keep alert when you are in a completely unknown environment.
在一个完全陌生的环境里，你必须随时保持警惕。
We meet today with unprecedented challenges, all of which are completely unknown.
我们今日遇到挑战前所未有，所有的情况完全陌生。
This new type of cultural pluralism is completely unknown in the history of mankind.
这种新型的文化多元化在人类历 史上闻所未闻。
An unknown disease affected his brain so badly that he lost his memory completely.
一种莫名的疾病严重影响了他的大脑，使他丧失了全部记忆。
However charmed by unknown power, these evil spirits completely resist any form of attack.
谁也想不到，这些邪灵受到不知名的魔法保护，完全抵挡了任何形式的攻击。
However charmed by unknown power, these evil spirits completely resist any form of attack.
谁也想不到，这些邪灵受到不知名的魔法保护，完全抵挡了任何形式的攻击。
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