n.

1. 苏打，碳酸钠；小苏打，碳酸氢钠[U]
2. 苏打水；汽水[U]
3. （一杯）苏打水；（一杯）汽水[C]
   Two whisky and sodas, please.

   请来两杯威士忌苏打。

n.

1. (also soda water) carbonated water (originally made with sodium bicarbonate).
   ▸chiefly N. Amer. a sweet carbonated drink.
2. sodium carbonate.
   ▸sodium in chemical combination:

   nitrate of soda.