来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/12 05:47:50
open up 用英语说
open up 打开；开发；开始；展示,揭露 open up v.1.cause to open or to become open 2.become available 3.make available 4.open up an area or prepare a way 5.start to operate or function or cause to start operating or functioning 6.become open
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