/bed/ n. 床
- A bed is a piece of furniture that you lie on when you sleep.
- Did you go to bed late last night?
- We finally went to bed at about 4am.
- By the time we got back from dinner, Nona was already in bed.
- This bedroom only has a single bed. lie in bed 表示睡觉的状态，床和被子算是一个整体，脱了衣服穿上睡衣，钻进被窝要睡觉的状态。 lie on the bed 强调所处位置，不是在睡觉，可能在床上玩手机。