1.
(of discussion, communication,etc)producing no useful results;unproductive
（指讨论、联系等）无结果的,无效果的
2.
Much was ineffective.
许多工作毫无效果。
3.
The state or quality of being incapable of producing a desired effect or result.
无效果无能力产生预期效果或结果的状态或性质
4.
"I tried losing weight, But nothing worked."
我曾试着减肥,但是毫无效果
5.
an inefficient campaign against illegal drugs.
反对非法毒品的无效果的运动
6.
We tried and tried, but it was all to no avail.
我们试了又试，但是毫无效果。
7.
We tried to arrange a peace agreement, but accomplished nothing.
我们试图达成和平协议，但毫无效果。
8.
They protested but to no avail.
他们提了抗议,但毫无效果。
9.
The effect was nil.
效果为零，效果全无。
10.
make ineffective by counterbalancing the effect of.
通过均衡……的效果使无效。
11.
at present this illness doesn't answer to medical treatment
目前此病无治疗效果。
12.
Not capable of producing a desired effect or result; ineffective.
不灵的无法产生预期的效果或结果的；无效的
13.
If we have little of substance to say, a polished presentation means little.
如果言之无物,修饰的表达效果不大。
14.
Not productive of a good or useful result.
无结果的，无成效的不产生商品或有用结果的
15.
Result: 40 of them is cure, 76 of them is effective, 4 of them is inaction.
结果：治愈40例，有效76例，无效4例，总有效率96.7%。
16.
the act of nullifying; making null and void; counteracting the effect or force of something.
使无效的行为；使无效或不发挥作用；取消某些事物的效果和作用。
17.
Not bearing fruit or offspring; barren.
不结果实的；无效的不产生果实或后代的；不育的
18.
The plant growth regulator. 83008-1, has a favorable effect on the fruittingperformance of the fig tree, Ficus carica.
83008—1对无花果的结实具有明显的作用效果。