All clocks must have a regular, constant or repetitive process or action to mark off equal increments of time.

所有时钟都必须有一个均匀、恒定或重复的划分时间等量增加的过程或动作。

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Meanwhile, starter Mark Sanchez struggled amid constant questions about Tebow's playing time, and still Tebow remained mostly on the sideline.

NPR: Tebow Time In New York Over After Jets Cut QB

Mark Regan was a constant irritation to the Stade pack in the first half, but after the break the French side began to get more into the game.

BBC: Bristol 17-0 Stade Francais

The wily Argentine, who scored twice in the 2-2 draw between the sides at Dens Park earlier this month, had a free role behind strikers Steve Lovell and Mark Burchill and was a constant threat with his sharp twists and turns.

BBC: Rangers complete Treble