look up at表抬头看，如
look up at the sky
抬头看天空
look up to表尊敬，如
look up to the teacher
对老师尊敬
look up at
look up at sth/sb. 抬头看这某东西/事物
look up to 后面要加do 抬头去做某事，如盯着某事物、倾听某事物
look up to listen to what he wanted to say 抬头听他说什么
look up at意思抬头看……
look up to尊敬……
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