short for open (adj.), early 13c. "not closed; not hidden;" originally as awake is from awaken, etc. As a verb from mid-15c. Middle English had ope-head "bare-headed" (c. 1300).
实用例句
1. Data co ection already ope tra fer starting.
数据连接已经打开,开始传送数据.
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2. Spring Break: Read the parts of Chap. 6 that complement the OPE material discussed in class.