a free-form jazz improvisation自由创作的爵士乐即兴演出Most of their music was spontaneous improvisation.他们的大部分音乐作品都是即兴创作的.He coached the young man in the theatre and developed his power of improvisation.他辅导那位年轻人演戏,培养他的即席表演能力....
销售者必须开具税务发票.The seller has to issue a tax invoice.这个唯一的销售者通过这种方法就能拓展他的地位.The single seller is in this way able to exploit his position.销售者了解到这个人急于买到汉堡包.The seller realized this person's craving for a hamburger....