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我上網睇, 四維四方體.
都係一個大四方體.包著入面一個小四方體.
我就唔明, 咁我地人類變左四維顯示時.
是否外邊又一個人形, 包著自己?
有D 人體模形, 叫自己4D, 是因為睇倒內臟.
咁4D 係咪即係一定透明?