adjective
upper
/'ʌpә/
upper 是什么意思
上面的,较高的,上级的,上院的
Piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot the topmost one of two higher in place or position superior in rank or accomplishment.
词性
adjective
难度
进阶
页面用途
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