Most people know that UV radiation can damage skin, but they don't realize it's also bad for eyes.
大多数人都知道紫外线辐射会伤害皮肤,但他们不知道紫外线辐射同时也会损害视力。
You don’t know what tomorrow holds. One more day may be all it will take to realize your dream!
你不知道明天会发生什么,也许只要再坚持一天你就能实现梦想!
From the fourth paragraph, we know people don't always realize how loud their music is.
从第四小节,我们知道人们并不总是能意识到他们的音乐有多大声。
Then we realize once again that we can only know what it is if we come to understand--in this case, probably, it's best to say a cultural system, understood as a semiosis, within which it appears.
这样我们就又明白了,只有在一个特定的文化系统中,我们才能认识一个符号。
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