sit on a/the couch
She sat on the couch and watched TV.
她坐在沙发上看电视。
（心理治疗用的）诊疗床；躺椅；床；休息处；底漆；底涂层；匍匐冰草；茅草；（制麦芽用的）麦床；发芽床
An upholstered seat for more than one person; a sofa.
床,休息处
A bed, a resting-place.
狗牙根,一种顽固的草种,通常被视为杂草。
Couch grass, a species of persistent grass, Elymus repens, usually considered a weed.
沙发
an upholstered seat for more than one person
水獭的巢穴
The den of an otter.
底漆
a flat coat of paint or varnish used by artists as a primer
初步涂层,如颜色或尺寸
A preliminary layer, as of colour or size.
诊疗床
a narrow bed on which a patient lies during psychiatric or psychoanalytic treatment
在麦芽制作中,铺在地板上发芽的浸泡大麦；或大麦占据的地板
A mass of steeped barley spread upon a floor to germinate, in malting; or the floor occupied by the barley.
选择不投票的选民,通常是待在家中沙发上
Voters who opt out of voting, usually by staying home on their couch.
After a long day at work, I like to relax on the couch and watch TV.
工作了一整天后，我喜欢躺在沙发上看电视。
用法提示：这里'couch'作为名词，指一种供多人坐的软垫座椅。
The cat is sleeping on the couch in the living room.
猫正在客厅的沙发上睡觉。
用法提示：'couch'在句中指客厅里的沙发。
We bought a new leather couch for the family room.
我们为家庭活动室买了一款新的真皮沙发。
用法提示：'couch'在此指家具中的沙发。
She sat on the couch and watched TV.
她坐在沙发上看电视。
He likes to lie on the couch after work.
他下班后喜欢躺在沙发上。
They bought a comfortable couch for the living room.
他们为客厅买了一张舒适的沙发。
与'couch'基本同义，但'sofa'更正式、通用；'couch'多用于美式口语
通常比沙发小且轻便，常见于英式英语
没有靠背和扶手，常可兼作床，风格与普通沙发不同
仅适合两人，比标准沙发窄，较亲密
couch 常指可躺下的长沙发或睡椅，sofa 更强调有扶手和靠背的标准沙发
皮沙发
They bought a new leather couch.
他们买了一张新皮沙发。
沙发垫
The cat scratched the couch cushion.
猫抓破了沙发垫。
电视迷
He's a couch potato who watches TV all day.
他是个整天看电视的电视迷。
精神科诊疗床
The patient lay on the psychiatrist's couch.
病人躺在精神科诊疗床上。
沙发套
We need a new couch cover to protect it.
我们需要一个新的沙发套来保护它。
借宿沙发
She spent a year couch surfing across Europe.
她在欧洲花了一年时间借宿沙发。
电视迷；懒人
He spends every weekend on the sofa, a total couch potato.
他每个周末都窝在沙发上，完全是个电视迷。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.