過一天算一天
with no thoughts or plans for the future
They live from day to day, looking after their sick daughter.他們過一天算一天,日復一日地照顧著生病的女兒。
天天,一天又一天(指經常變化)
if a situation changes from day to day, it changes often
A baby's need for food can vary from day to day.嬰兒對食物的需要天天都在變化。
釋義來自《牛津高階英漢雙解詞典》第 9 版