adj.（東西）無效的；無益的；白費的；（人）無能的

The searchlights were ineffectual in the fog. 探照燈在霧中不起作用。

All rescue measures proved ineffectual. 所有搶救措施都證明無效。

She had felt at the same time that he was helpless and ineffectual. 同時她也看到了他的孤弱無能，無所作為。

The years of ineffectual service counts big in the bestowal of rewards. 幾年徒勞無益的服務(wù)，在論功行賞時就大有關(guān)系。

They made some ifefnectual attempts to reform the law 他們試圖改革法律，結(jié)果只是徒勞。

He won't be able to deal with the situation; he's too ineffectual. 他無法應(yīng)付局面

adv.無效地；無益地