в основном

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The earth's atmosphere is largely composed of nitrogen and oxygen.

Concretions are composed (pre)dominantly of calcium carbonate.

This chapter principally compares the characteristics of ...

Nitric acid is significantly natural in its occurrence.

Most of the theory is basically the same as that of sound waves in air.

Basically, these variations result from ...

Bone ash gives essentially the same counting efficiency as ...

The instrument consists essentially of a prism, a pan of mercury, ...

For the most (or major, or greater) part, the subjects are covered adequately.

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

The region for linear operation will be determined fundamentally by the maximum width of ...

The heading remains much as in the previous version.

Axial transport in unpacked tubes is predominantly (or principally, or chiefly, or mainly, or in the main) by conversion.

The article is primarily concerned with ...

Some types of sedimentary rocks are substantially of the same composition as clay.

The corpuscular radiation from the Sun, mostly electrons and protons, is an efficient source of ...

This fuel resists combustion knock principally because it has ...

Typically the canopy is closed and the forest is dark, although ...

The colour force is overwhelmingly employed in the service sector.

When the process is substantially complete, ...

Источник: Русско-английский научно-технический словарь на Gufo.me