early 13c., from Old English la, exclamation of surprise, grief, or joy; influenced in Middle English by lo!, short for lok "look!" imperative of loken "to look" (see look (v.)). Expression lo and behold attested by 1779.
实用例句
1. Connect the HI and LO terminals of Ch. 1 together.
将通道1的HI和LO端子连接在一起.
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2. Connect the HI and LO terminals of Ch. 2 together.
将通道2的HI和LO端子连接在一起.
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3. Lo is doubtful about the prospect s of amajor Chinese - Russian energy deal.
Lo对中俄之间一项重要的能源交易前景表示担忧.
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4. Also, note that in most pole cards , all LO terminals are common.
此外还要注意,在大多数的单刀开关卡中, 所有的LO端子 是共用的.
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5. Measure resistance between the HI and LO output terminals.