take it one day at a time/take each day as it comes idiom
顺其自然，不为未来计划（或忧虑）
to deal with things as they happen, and not to make plans or to worry about the future
I've lived through a lot of changes recently, but I've learned to take it one day at a time. 近来遇到诸多变故，但我已学会凡事要顺其自然。