play it by ear
这句短语原是音乐用语，指某人仅凭听过的记忆就可弹奏乐曲。由此意引申出来后，"play by ear"强调事件的“即兴”成分，没有计划、依据当时情况而行事(to let things go as they may)，很有“边走边看吧，走着瞧，随机应变”的味道。
例：
We can't make a decision yet. Let's just play it by ear.
我们还不能做出决定，让我们到时候看着办吧。
It's your choice/call.
上边那个短语偏向于“看着办”中的边看边干，而这个说法就侧重于“你自己说的算”，你看着办，你说怎么办就怎么办。当别人问你意见或者决定，而你没有时间决定，你就可以交给对方，让他看着办吧。
比方说
A: What should I cook for dinner tonight?
今天晚上晚饭做什么?
B: It's your call. I'm actually not that hungry.
你看着办吧。说实话我并不怎么饿。
改天吧
rain check
“改天吧”经常出现在懒人或大忙人的口中，相当于英语中的"rain check"。该短语来源于美国的棒球文化，如果球赛进行时因为大雨不得不暂停，观众可领“雨票”，或用原票存根作为“雨票”(rain check)，球赛改期举行时可凭之入场。
例：
A：How about a cup of coffee?
去喝杯咖啡?
B：Rain check
改天吧。
随你吧
have it your way
To do what one wants or maintain a situation as desired. Typically used as an imperative when the speaker is irritated, often because their advice is being ignored.
按某人自己的意愿去做或维持一种状态。经常在说话者生气时使用，因为他们的建议被忽略了。
例：
Fine, have it your way—sit in the sun. But I won't be the one slathering aloe on you if you get sunburned!
算了，随你吧——坐在阳光下。但如果你被晒伤了，我不会是那个往你身上涂芦荟的人!
我都行!
I'm cool with it.
That/it is acceptable to me; I'm OK with that/it.
我能接受这个事情，我觉得没问题。
例：
Yeah, we could leave later - I'm cool with that.
是，我们可以晚点走——我没意见。
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