It is up to you 是什么意思?

1.It is up to you.
随你便.收藏指正
2.It is up to you to decide.
这事由你定夺.收藏指正
3.It is up to you to break the news to him.
该由你把这个消息告诉她.收藏指正
4.It is up to you to decide.; It's to be decided by you.; We'll leave it to you for decision.
这事由你定夺.收藏指正
5.I'd give you my advice; whether or not you act on it is up to you.
办法我已经告诉你了；是否照办是你的事.收藏指正
6.Then it is up to you to accessorize with beads,feathers,fur,hats or anything else that takes your fancy.
之后,是搭配珠子、羽毛、毛皮、帽子,还是你所喜好的其它什么东西,就由你来定了.收藏指正
7.I won't promise to be up to see you off.You know how it is—the spirit is willing but the flesh is weak.
我不会答应起身送你.你知道其中的缘故—我是力不从心哪.收藏指正
8.Make sure you have a good antivirus product and it is kept up to date.
确信你已经有一个好的反病毒产品,并且保持最新.收藏指正
9.It is about time you squared up to the fact that you have a drinking problem.
该是你正视自己酗酒问题的时候了.收藏指正
10.It is no good making up to your brother ,he will not help you .
向你哥哥献殷勤没有用,他不会帮你的.收藏指正
主要的最常见的 就是 由你决定 取决于你
在具体句子做适当解释