sack/sæk/

n. a large bag made of a strong material such as thick paper, cloth, etc.

n. [C] 厚纸袋；粗布袋；大袋：[a sack of sth] The mill turns out about 400 sacks of flour per week. 这个厂每星期生产约400袋面粉。

音组-ack/-æk/

attack; back; black; lack; pack; sack