ineffectual

adj.

无效的，不起作用的；徒劳无益的；

n.

无用的人；无一技之长者；

1. The searchlights were ineffectual in the fog.
   探照灯在雾中不起作用。
2. All rescue measures proved ineffectual.
   所有抢救措施都证明无效。
3. Her hands were almost ineffectual.
   她的手也几乎没有用。
4. She had felt at the same time that he was helpless and ineffectual.
   同时她也看到了他的孤弱无能，无所作为。
5. The years of ineffectual service counts big in the bestowal of rewards.
   几年徒劳无益的服务，在论功行赏时就大有关系。
6. They made some ineffectual attempts to reform the law
   他们试图改革法律，结果只是徒劳。
7. He won't be able to deal with the situation; he's too ineffectual.
   他无法应付局面

Sparing of verbs and preserved, but ineffectual reading in a patient with impaired word production.
Cnvlutin: Ineffectual-Neuron-Free Deep Neural Network Computing
Sexual selection is ineffectual or inhibits the purging of deleterious mutations in Drosophila melanogaster
Increased but ineffectual angiogenic drive in nonhealing venous leg ulcers.
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Digital camera module with controlled disabling
Editor for smart version control
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Ferritin: a cytoprotective antioxidant strategem of endothelium.
The Treatment for Adolescents with Depression Study (TADS): methods and message at 12 weeks