Right up until the 18th century this coarse sugar, which had to be crushed before use, was regarded as an expensive luxury which, like tea, had to be locked away to keep it safe from thieving hands.
搗碎使用的粗糖直到十八世紀，仍算是昂貴的奢侈品，因此像茶一樣需要上鎖，以防下人偷用。