How to say "It depens on", "up to " in Chinese ?

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Depends on   "依靠"或‘’取决于...‘’
up to  “由某人决定” 或 “直到...”

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"It depens on" 要看情況而定，每個人會有不同的狀況。
if it's  >>up to you means 隨妳啊 ，都可以

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It depens on A :   具体问题具体分析. It 依A情况而定，It 看A情况 ，It 取决于A,It 视A情况而定
A be  up to  B :  A 是由B决定的,  B决定 . 例如  It 's up to you.  指事由你定，随你定，随你便

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You can say “取决于”，“视........而定”或”由......来定“
eg.Success often depends on temperament. 成功常常取决于一个人的性格。 
 It depends on situation. 这要视情况而定。
It's up to you. 由你决定。