ineffective

• adj. 無效的，失效的；不起作用的

in-,不，非，effective,有效的。

ineffective (adj.)

1650s, from in- (1) "not, opposite of" + effective. Related: Ineffectively; ineffectiveness.

1. This is an ineffective method of controlling your dog.

用這種方法控製你的狗不起作用。

來自柯林斯例句

2. If they prove ineffective they should be demoted or asked to retire.

如果事實證明他們已無力勝任，應該將他們降級或讓他們退休。

來自柯林斯例句

3. Economic reform will continue to be painful and ineffective.

經濟改革仍將舉步維艱，毫無成效。

來自柯林斯例句

4. An all-female political section would have been operationally ineffective.

一個由清一色的女性組成的政治部門工作起來將會毫無效率可言。

來自柯林斯例句

5. The new drug was ineffective.

新藥不起作用。

來自《權威詞典》