USES improper, is not only invalid, even works just the opposite, causes the condition aggravation.

使用不当，不但无效，甚或适得其反，使病情加重。

youdao

If the two don't match, the certificate is only suspect, not invalid.

如果二者不能匹配，就只有怀疑这个证书无效了。

youdao

If the two don't match at this point, the certificate is only suspect, not invalid.

如果这两个实体在此处不能匹配，那么就只能怀疑这个证书是无效的。

youdao

Their conclusion, however, not only is invalid it derives from a false premise it also is false because it is grossly at variance with the empirical record.

FORBES: Do We Face A Government Default, Or De-End?