”冰冻山尺,非一日之寒” 英文

This has not come about overnight.
冰冻三尺,非一日之寒.
Rome is not built in a day.
冰冻三尺,非一日之寒.
This unpleasant situation is not brewed in a day.
冰冻三尺,非一日之寒.
It takes more than one cold day for the river to freeze three feet deep; The trouble has been brewing for quite some time.
冰冻三尺,非一日之寒.
这些都可以的,金山里可以查到

Rome is not built in a day。

Rome was not built in a day.
Note: Rome was built already, so it would be better in past tense.

Rome is not built in a day.
冰冻三尺，非一日之寒。