опускать

I

см. погружать в

II

см. тж. отбрасывать

We drop all subscripts.

For richer concentrates, roasting is omitted at many plants.

Let us now pass over the distribution of molecular speeds in two dimensions and proceed directly to ...

Terms like this can be thrown (or dropped) out.

It is conventional to leave out all the high powers of 2.

Chemists have the tendency to shorten long names by leaving out syllables.

For air S is unity and may be omitted from the formula.

The second term in Eq. (10.35) can be dropped (or discarded).

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