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см. тж. без изменения; оставаться без изменений

This benzene ring has remained intact.

In this way the positioning of the optics can be left untouched (or intact).

The total number of atoms is (or remains) fixed (or unchanged, or the same).

The analogue-to-digital interface must remain invariant (or unaltered, or constant, or unchanged) despite modifications or changes in the computer.

The velocity of the centre of mass does not change during collision.

Today a number of details in the original paper have been revised, but the basic mechanism of ... remains intact.

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