讲解文本：

look down on 小看，看不起，轻视
Don't look down on me just because I'm ugly!
别因为我丑而看不起我！

look down upon 小看，看不起，轻视
He is young and inexperienced, but please do not look down upon him.
他年轻又无经验，但请不要因此而小看他。

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