1) Having been together for a long time, they came to have a tender feeling for each other
日久情生
2) Familiarity Begets contempt
日久厌生
3) Discipline tends to get lax as time goes by
日久玩生
4) Too much familiarity breeds contempt.
日久生厌。
5) the birthday feelings
生日情怀
补充资料：日久
1.时日长。
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