изучаемый

см. тж. интересующий нас; исследуемый; рассматриваемый

When a system of interest works, ...

The substance to be studied ...

In the range covered (or under study, or under investigation, or under discussion, or being discussed) the curves are in good agreement with experiment.

This quantity can be obtained from the phase diagram of the system involved.

The test substance.

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