1
the upper part of sth
指某物的较高部分。
He was shot in the upper part of his arm.
他的手臂上部中枪。
较高的；上面的；上部的
先理解核心含义，再看它在真实句子里的用法。
较高的；上面的；上部的
located at a higher position than something else
He was shot in the upper part of his arm.
他的手臂上部中枪。
在更高的物理位置、水平、等级或顺序
At a higher physical position, level, rank or order.
位于更高的地面、更内陆、更上游或更北
Situated on higher ground, further inland, more upstream, or more northerly.
较年轻,较近期
Younger, more recent.
与中学有关的
Of or pertaining to a secondary school.
The upper shelf is too high for me to reach.
上面的架子太高，我够不着。
She lives on the upper floor of the old building.
她住在那栋旧楼的上层。
His upper arm was injured during the game.
他的上臂在比赛中受伤了。
指某物的较高部分。
He was shot in the upper part of his arm.
他的手臂上部中枪。
She has a tattoo on her upper arm.
她的上臂有一个纹身。
常用于社会阶层或等级。
They belong to the upper class.
他们属于上流社会。
固定短语，意为占优势。
Our team has the upper hand in the negotiations.
我们队在谈判中占上风。
Not this
The over floor is quieter.
Use this
The upper floor is quieter.
形容词'upper'表示位置较高的、上方的，而'over'是介词或副词，不能作定语形容词直接修饰名词。
Not this
She hurt her top lip.
Use this
She hurt her upper lip.
'upper'指相对较高的部分（如上唇），而'top'通常指最高点或顶部，用于描述连续体中的最上端，此处应用'upper'更准确。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
优势，上风
She gained the upper hand in the negotiation.
她在谈判中占了上风。
上层阶级，上流社会
He comes from an upper-class family.
他出身于上层阶级家庭。
上唇
A slight smile curled his upper lip.
一丝微笑使他的上唇翘起。
上臂
He has a tattoo on his upper arm.
他上臂上有个纹身。
上限
The budget has an upper limit of $5000.
预算上限为5000美元。
上半身
These exercises strengthen the upper body.
这些锻炼可以增强上半身的力量。
占上风，有优势
After a tough negotiation, our company finally had the upper hand.
经过艰难的谈判，我们公司终于占了上风。
上流社会，上层阶级
The charity ball was attended only by the upper crust of society.
这场慈善舞会只有上流社会的人参加。
穷困潦倒，一贫如洗
After losing his job, he was on his uppers and had to borrow money.
失业后他穷困潦倒，不得不借钱。
保持坚毅的上唇，坚持下去，坚持下去
The song 'Stiff Upper Lip' by AC/DC encourages listeners to maintain a stiff upper lip.
AC/DC的歌曲《Stiff Upper Lip》鼓励听众保持坚毅不拔的精神。
Use upper naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住upper由up（上）加比较级后缀-er构成，表示更上面的。
对于形容词义项“上面的”或“较高的”，通常用于描述空间位置或等级关系，语体中性，在多种日常和专业场合均适用。
通常用作定语，无比较级形式。
Dictionary facts from ECDICT, WIKTIONARY.