不可数。
n. 产物（不常用）
Then compared their clinical effection and the change of ECG and RPP.
比较两组治疗后的症状，心电图，率压积的变化。
After the practical test on this system， it has the expectant effection.
通过实际测试，本系统取得了预期的效果。
Objective To observe the clinical effection of treating the UAP with Herbesser.
目的观察合贝爽治疗不稳定性心绞痛的临床疗效。
The principle and effection of correlation filter are also discussed in the paper.
文中还对该仪器中所使用的相关滤波器原理及滤波效果等问题进行了讨论。
effection可数么
它是不可数名词，是不可数的
