B1 at a higher position or level than something else, or being the top part of something(位置或水平)较高的,较上的;上层的
More examples
We sat in one of the upper tiers of the football stands.
the upper jaw/lip
He died from multiple stab wounds to the neck and upper body.
the upper age limit
the upper echelons of society
the top part of a shoe that covers a person's foot and to which the heel and the sole are attached鞋帮
informal a drug that causes a person taking it to feel very active and excited兴奋剂
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