Polish up your writing skills on a one-week professional course.上为期一周的专业课,提高你的写作技能。I'm going to New York, so I must polish up my English.我要去纽约, 因此我必须提高英语水平.You've got to polish up on your idiomatic expressions....
他们对成本发表了一些很不妥当的评论。He made some ill-considered remarks about the cost.这次旅行带孩子不妥当。It is inadvisable to bring children on this trip.人们认为年轻女子独自去那里是极不妥当的.It was thought highly inadvisable for young women to go there alone....