She was forced to settle on terms grossly unfavourable to her.她被迫同意接受对她极其不利的条件。

These conditions are extremely unfavourable to women who seek long-term mates.这些条件对寻找长期伴侣的妇女极为不利。

The whole international economic situation is very unfavourable for the countries in the south.整个国际经济形势对南部国家非常不利。