couch与sofa这两个名词均可表示“沙发”之意。
couch : 指供昼夜坐卧，似床一样的长沙发或睡椅。
- Roy swung his legs carefully off the couch and sat up.
罗伊小心地把腿挪下沙发，坐了起来。 - She slipped out of the jacket and tossed it on the couch.
她麻利地脱下夹克，扔在了沙发上。
sofa : 指有扶手和靠背，可供多人坐或一个人睡的长沙发，也泛指沙发。
- She sat down next to him on the sofa.
她紧挨着他在沙发上坐下了。 - The kitten was curled on a cushion on the sofa.
那只小猫在沙发垫子上蜷缩成了一团。
