无 wu2 無
时 shi2 時
无 wu2 無
刻 ke4 刻
  1. (idiom) (when followed by 不[bu4]) at no time; never (Note that in combination with 不[bu4], the meaning is "at no time not ...", i.e. "at all times".)
  2. (when not followed by 不[bu4]) at all times; always

Examples

汤姆和玛丽无时无刻不在辩论。

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