A gradual change or process occurs in small stages over a long period of time, rather than suddenly.
slow
sudden
Losing weight is a slow, gradual process.
减肥是一个缓慢而逐进的过程。
You can expect her progress at school to be gradual rather than brilliant.
你可以期望她在学业上循序渐进，但别指望她能突飞猛进。
