The flexible use of the Language of Art oversteps the normal rule of grammar and logic in special situations so that we can get the best expression effects of communications of speech.

艺术语言的“活法”是在特定语境下，为了取得最佳的交际效果，而对常规语法、逻辑的超越。

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On ceasing to be a minister in 1997 we reverted to the normal rule of claiming additional costs in London.

BBC: Statement in full: David Maclean

"The HTA recognises there are situations were it may be possible to vary the normal rule of meeting clinical urgent need, " he added.

BBC: How the organ donor system works

The normal rule of thumb was that a canal (subject of another boom earlier in the 19th century) would halve the cost of transporting coal, and that rail would halve it again.

ECONOMIST: Booms and busts