数据库设计系统日志表:请问keep up one's mind+?

请问keep up one's mind+? turn up one's nose at "Keep one's saw sharp"是什么意思 measure up to one’s expectations是什么意思 请问up your's是什么意思？ make up one's mind后面跟to do 还是doing? what's up 翻译1.turn up one's nose at 2.black and blue 3.laugh off one's head 4.at sixes and sevens It’s difficult to keep up _______ these changes in fashion no-one's gonna say all those names, so they'll wind up calling her Geller如何翻译