| 单词 | zero |
| 释义 | zero n. & v. --n (pl. -os) 1. a the figure 0; nought. b no quantity or number; nil. 2. a point on the scale of an instrument from which a positive or negative quantity is reckoned. 3. (attrib.) having a value of zero; no, not any (zero population growth). 4. (in full zero-hour) a the hour at which a planned, esp. military, operation is timed to begin. b a crucial moment. 5. the lowest point; a nullity or nonentity. --vtr. (-oes, -oed) 1. adjust (an instrument etc.) to zero point. 2. set the sights of (a gun) for firing. Phrases and idioms zero in on 1 take aim at. 2. focus one's attention on. zero option a disarmament proposal for the total removal of certain types of weapons on both sides. zero-rated on which no value added tax is charged. zero-sum (of a game, political situation, etc.) in which whatever is gained by one side is lost by the other so that the net change is always zero. Etymology: F z{eacute}ro or It. zero f. OSp. f. Arab. sifr CIPHER |
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