главным образом

см. тж. в основном; в первую очередь

• The attachment consists essentially (or chiefly, or mainly, or in the main) of a cable drum and ...

• The shield has been designed for the most part from common materials.

• The greater (or major) part of our work was carried out indoors.

• The foam consists predominantly of closed cells.

• This element is composed principally (or chiefly, or mainly, or primarily) of Zircaloy-2.

• This compound is presently used primarily as ...