1the top and bottom of sth
2the full vertical extent of sth; from top to bottom
3to go up and down
4before and after (as in 上下文 "context")
5(used after a quantity) approximately; ... or so
6all members of a group (as in 舉國上下|举国上下 "the entire nation")
7relative superiority (as in 不相上下 "evenly matched")
8(in a social hierarchy) the high and the low; seniors and juniors (as in 上下和睦 "harmony between superiors and subordinates")
Examples
rén tǐ人体de的píng jūn平均wēn dù温度zài在37°Cshàng xià上下fú dòng浮动。
人体的平均温度在37°C上下浮动。
The temperature of the human body hovers around 37°C.
没有上下文就没有词义。
No context, no text.
你搭公车上下学吗？
Do you go to school by bus?