accumulate over a long period

• 日积月累

accumulate over a long period的用法和样例：

例句

1. From long experience she knew exactly where to snatch.
   根据日积月累的经验，她知道从哪里准能偷到。
2. This attitude, over the long haul, will develop very resentful and uncooperative family members.
   这种态度，日积月累，在家人之间就会发展为抱怨和不和。