否定前缀是: no，构成noneffective
n. 无效无战斗力
adj. 无效的无战斗力的
So the regeneration of high loading rate sludge was noneffective.
对于高负荷污泥的再生是无效的。Humour is a more effective defence than violence.
幽默是比暴力更有效的防御武器。
Television is an effective means of communication.
电视是一种有效的通信手段。
He has now taken effective control of the country.
他目前已有效地控制了这个国家。
