When someone says “Time is on your side” to you, they mean that you can wait for something to happen or can wait before doing something. “Time is on your side.” 直译为“时间在你这边”，而实际意思则为“你有的是时间。不用太着急。”类似的，如果我们要说“没有时间，时间仓促”的话，也可以说“Time isn’t on your side.”。

Examples:
Start early, and time is on your side. 及早开始，你就会有足够的时间。

When you are young, the time is on your side. You can think of the goal you want to achieve carefully. 当你年轻的时候，时间很充裕。你能仔细想想你想要达到的目标是什么。

You should learn how to manage your time. Why time is always not on your side? 你应该学会怎么管理时间。为什么总是时间不够呢？