He is an expert in international law.

Binomial nomenclature plays an important role in biological taxonomy.

He drew a circle using geometric construction.

Electroporation is a biotechnology technique that creates temporary holes in the cell membrane to incorporate substances into the cell.

Variational method is a branch of mathematics used to find the minimum and maximum values of functions.

Thinking sensibly, that plan will not succeed.

This is a preliminary plan.

He is interested in diachronic linguistics studies.

He is interested in synchronic linguistics.

That theory is unscientific and has no evidence at all.