they are mostly womenen su mayoría or en su mayor parte son mujeres;la mayoría or casi todas son mujeres
the men at the party were mostly fairly young
this part of the country is mostly unspoiledesta zona del país conserva, en su mayor parte, su belleza natural;owls hunt mostly at nightel búho caza principalmente or sobre todo de noche;mostly because ...principalmente porque ...;sobre todo porque ...;it's mostly finishedestá casi terminado
it's mostly a book about natureShe had had a very exciting career, mostly in Birmingham