与 occur 连用,指 “时间上快”。具体说,指两个动作发生的时间,间隔非常短。意思等于 soon 或 immediately。例如,药物服用后效果很快就显现。
The effect occurs rapidly after you take the medicine. =
The effect occurs soon after you take the medicine. =
The effect occurs immediately after you take the medicine.