Complex sentence: In the original metric system, the unit of dry volume was the stere, but this is not part of the modern metric system; the litre (American, liter) and the cubic metre (American, meter) (m³) are now used.
Split into simpler sentences: In the original metric system, the unit of dry volume was the stere, but this is not part of the modern metric system. The cubic metre (American, meter) (m³) is now used.