He has just poured a sugary soda powder into a glass of water and is mixing enthusiastically with a wooden stir stick.
他刚刚将含糖苏打粉倒入一杯水中,正用一根木制搅拌棒热情地搅拌。
英语百科
Sherbet (powder)
(重定向自Soda powder)
Sherbet, kali (Northern English), or keli (Scottish) is a fizzy powder sweet, usually eaten by dipping a lollipop or liquorice, or licking it on a finger.