1. 利用多次垂直掃描來重顯一幅完整圖象的掃描技術(shù)。電視中使用2：1的交錯(cuò)率，即每幀分兩場(chǎng)，垂直掃描兩次，一場(chǎng)掃描奇數(shù)行，另一場(chǎng)掃描偶數(shù)行。
   In scanning, the technique of using more than one vertical scan to reproduce a complete image. In television, 2:1 interlace is used, giving two vertical scans(fields) per frame; one field scans odd lines, and one field scans the even lines of the frame.
2. 在系統(tǒng)中等待處理的一組或一隊(duì)列新信息，主調(diào)度程序對(duì)該隊(duì)列及其它隊(duì)列進(jìn)行掃描，使之順序進(jìn)入處理狀態(tài)。
   A queue of new messages(or a group) within a system that are awaiting processing. The main scheduling routine will scan them along with other queues and order them into processing in order.
3. 醫(yī)生給他做了腦部超聲波掃描檢查。
   The doctors gave him an ultrasonic brain scan.

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描的英語(yǔ)翻譯：