刘老师，最后想跟你确认一下，very rapidly 修饰occurs 是否肯定是表示“时间快”，这里不是指“速度快”。
与 occur 连用，指 “时间上快”。具体说，指两个动作发生的时间，间隔很短。意思等于 soon 或immediately。比如，药物服用后成效非常快就显现。
The effect occursrapidly after you take the medicine. =
The effect occurs soon after you take the medicine. =
The effect occurs immediately afteryou take the medicine.
