on one's back
指仰卧姿势，背朝下。
He was lying on his back.
他仰面躺着。
背；背部；后背
backs — plural of back
后部；后面；背面；后盾；靠山；后备；脊；背部；顶部；大浅桶；缸；槽；（船的）龙骨
The rear part of a human or animal body between the neck and the lower end of the spine.
背部
The rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly.
大而浅的桶；酿酒师、蒸馏师、染工、腌制商、制胶商等用来混合或冷却麦芽汁、盛水、盛热胶等的水池、桶或槽。
A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc.
人(或动物)身体从颈部到脊柱末端的后部
the posterior part of a human (or animal) body from the neck to the end of the spine
最远离前面的部分
That which is farthest away from the front.
渡船。
A ferryboat.
最后出现或通常看不见的一面
the side that goes last or is not normally seen
类似动物背部的物体上部
The upper part of a natural object which is considered to resemble an animal’s back.
离正常观察者最远的部分
the part of something that is furthest from the normal viewer
后备支持或资源
A support or resource in reserve.
船的龙骨和龙骨翼板
The keel and keelson of a ship.
水平地下通道的顶部
The roof of a horizontal underground passage.
搭配烈酒的无酒精饮料
A non-alcoholic drink (often water or a soft drink), to go with hard liquor or a cocktail.
皮革商用语:最厚实坚韧的鞣制皮革之一。
Among leather dealers, one of the thickest and stoutest tanned hides.
My back hurts after sitting at the desk all day.
在桌子前坐了一整天后，我的背很疼。
用法提示：这里的'back'是名词，指人体背部，表示疼痛的部位。
AI contextual example
He carried his little daughter on his back through the park.
他背着小女儿穿过公园。
用法提示：这里的'back'是名词，指背部，用作支撑物。
AI contextual example
She has a small mole on her lower back.
她的下背部有一颗小痣。
用法提示：这里的'back'是名词，特指身体后侧的一部分。
AI contextual example
指仰卧姿势，背朝下。
He was lying on his back.
他仰面躺着。
There is a small garden at the back of the house.
房子后面有一个小花园。
常指物体的背面或后部。
He wrote his name on the back of the photo.
他把名字写在照片背面。
较正式，常用于建筑物、车辆等的后部；若指人身体，则常指臀部，需注意语境。
尤指扁平物体（如纸、钱币、照片）的背面，与正面相对，常构成 the reverse of；不指空间后部。
多指长形物或队列、过程的末端，如 the tail of the queue；不用于房间或建筑的背面。
grammar · medium
易错句子He is lying on back.
正确表达He is lying on his back.
英语中，谈及身体部位时通常需要物主代词（如my, his），而汉语常省略，导致遗漏。此处需用'his'来指明是'他的背部'。
grammar · medium
易错句子Please write at the back of the paper.
正确表达Please write on the back of the paper.
'在纸的背面'应用介词'on'表示表面，而'at'用于地点或位置，所以需改为'on'。
此处 back 为名词，指身体的后部或物体的背面/后部；front 为其反义名词，指身体的前面或物体的正面/前部。二者在方位上相对，但 front 不指“后背”。
rear主要指物体（如车辆、建筑）的后部，而back既可指身体后背也可指物体后面。
backside是非正式用语，特指臀部，而back指背部或后部，不指臀部。
下背部
He felt a sharp pain in his lower back.
他感到下背部一阵剧痛。
背痛
Prolonged sitting can cause back pain.
久坐会导致背痛。
在…的后部；在…后面
The library is at the back of the campus.
图书馆在校园的后部。
后脑勺
She bumped the back of her head against the door.
她的后脑勺撞到了门上。
仰卧着（背朝下）
The patient had to lie on his back for hours.
病人不得不仰卧数小时。
手背
He wiped his forehead with the back of his hand.
他用手背擦了擦额头。
noun
noun
noun
adjective
noun
adjective
脊柱位于背部中央，是支持身体的重要结构，常与背部的疼痛或健康问题一起讨论。
肩膀与背部相连，涉及上半身的活动和姿势，常出现在描述身体不适或动作的语境中。
脖子位于背部上方，与背部共同构成躯干的后侧部分，常见于身体部位和健康话题。
腰是背部下方的位置，常与背部一起提到，如腰酸背痛等日常表达。
姿势与背部的状态直接相关，谈论坐姿、站姿时经常会涉及背部健康。
支持某人，罩着某人
Don't worry — I've got your back.
别担心——我支持你。
背着某人，在某人背后（暗中做某事）
He was talking about me behind my back.
他背着我说我的闲话。
赞扬，鼓励
She gave the children a pat on the back for their hard work.
她因为孩子们的努力而表扬了他们。
我罩着你。
This phrase, popularized by movies and TV shows, is used to express loyalty and willingness to support or protect someone in a difficult situation.
这个短语因电影和电视剧而广为流传，用来表达忠诚以及在困难情况下支持或保护某人的意愿。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.