Avc
abbr. average variable cost 平均可變成本
??? 情景例句
She says
她也談起
Music is the medicine of the breaking heart.
音樂是醫治心靈創傷的妙藥。
Often a valley boasted no inn at all, and climbers found shelter wherever they could --
山谷里常常沒有小客棧，登山者只好隨遇而安。