ineffective

1. Not having the desired effect; ineffectual; otiose.

   wirkungslos

2. Lacking in ability; incompetent or inadequate.

   unfähig

   lacking the ability or skill to perform effectively; inadequate

1. Many people don't realize that antibiotics are ineffective against viruses.

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2. Many people don't know antibiotics are ineffective against viral diseases.

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3. Many people don't realize that antibiotics are ineffective against viral diseases.

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4. Why is it that many language courses are ineffective?

   ruПочему многие языковые курсы неэффективны?

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5. This is ineffective.

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