one day
01
有一天, 总有一天
a time in the future, often implying hope or an uncertain expectation that something will happen at some point
例子
One day, I hope to travel around the world.
有一天，我希望环游世界。
1.1
有一天, 一次
an unspecified or indeterminate time in the past, often used to introduce a past event or experience
例子
We decided to take a road trip with no particular destination in mind one day.
我们决定有一天进行一次没有特定目的地的公路旅行。
