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