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Rapid onset, and (usually) rapid resolution - as opposed to chronic diseases, which usually have a slow onset, and an insidious, protracted course.
rapid
Normally slow
Slow.
slow
distinguish between slow and rapid sand filter
differentiate between slow and rapid sand filters
It is rapid and episodic.
rapid
b. Rapid = 3 seconds or less; Slow = longer than 3 seconds.
Slow or improve
Cadence and average speed dictate the difference, however rapid vs slow refer's to a cycling cadence (RPM)