Meanings

Discrete Cosine Transform

discrete Fourier Transform

group paragraph conversion

exchange (something) together

telephone operator

language exchange

exchanging parts or equipment to effect a change in performance

digital-to-analog converter

demand for replacement

ventilation duct

Treaty of Saint Petersburg (1875)

turning point

exchange rate

advanced thermal converter reactor

telephone switchboard

exchange value

genetically-modified crop

returning to profit

collecting waste paper (old newspapers, etc.) and exchanging them for toilet paper

homologous recombination