Hot answers tagged synonyms
Mostly,上下 and 左右 have the same mean when you describe something. When you describe something high or low(mostly abstract things,like level), you can use 左右,比如 他的水平很高，有十级左右了。Abstract things usually use 左右, like level, time(十分钟左右,how long is your own feel). And not say 十分钟上下. When you describe something big or small,young or old(mostly you can tell by eyes) ...
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