1. 开放：在传输任何PPP Deflate报文被之前,PPP必须达到网络层协议(Network-Layer Protocol)阶段,CCP控制协议必须达到开放(Opened)状态在一个PPP链路上传输的PPP Deflate数据报的最大长度和一个PPP封装报文的信息域(Information field

2. 开的：opened system 开放系统;开式系统 | opened 开的 | openend contract 开口合同

3. 機場的啟用日期：run by 機場的管理機構 | opened 機場的啟用日期 | closed 機場的關閉日期

adj

1. made open or clear

e.g. the newly opened road

2. used of mouth or eyes

e.g. keep your eyes open
his mouth slightly opened

Synonym: open

3. not sealed or having been unsealed

e.g. the letter was already open
the opened package lay on the table

Synonym: open