| 单词 | reduction |
| 释义 | reduction[ri'dʌkʃən]n. 减少, 缩影, 变化【化】 还原【医】 复位术, 还原[作用], 减少, 减数【经】 减少, 缩减, 约简 reduction re.duc.tion AHD: [r¹-d¾k“sh…n] D.J. [r!6dJk.*n]K.K. [r!6dJk.*n]n.Abbr. red.（名词）缩写 red.1. The act or process of reducing.减少：减少的行为或过程2. The result of reducing:减少的结果：a reduction in absenteeism.缺席人数的减少3. The amount by which something is lessened or diminished:减少量：某物被缩短或减少的量：a reduction of 12 percent in violent crime.严重犯罪率下降12个百分点4. Biology The first meiotic division, in which the chromosome number is reduced.Also called reduction division 【生物学】 减数分裂：细胞第一次染色体数目减少大减数分裂也作 reduction division5. Chemistry 【化学】 6. A decrease in positive valence or an increase in negative valence by the gaining of electrons.还原：通过获得电子而造成正价电子减少和负价电子增多7. A reaction in which hydrogen is combined with a compound.氢化反应：氢与化合物结合的反应8. A reaction in which oxygen is removed from a compound.还原反应：把氧从化合物中分离的反应9. Mathematics 【数学】 10. The canceling of common factors in the numerator and denominator of a fraction.约分：削去分数中分子和分母的公约数11. The converting of a fraction to its decimal equivalent.分数化成小数：把分数写成与之相等的小数12. The converting of an expression or equation to its simplest form.简化方程式：把表达式或方程式化至最简的形式语源:1. Middle English reduccion [restoration] 中古英语 reduccion [重新设立] 2. from Old French reduction 源自 古法语 reduction 3. from Latin reducti½ reducti½n- 源自 拉丁语 reducti½ reducti½n- 4. from reductus [past participle of] red&9{¿}cere [to bring back] * see reduce 源自 reductus [] red&9{¿}cere的过去分词 [收回] *参见 reduce继承用法:reduc“tional adj.（形容词） |
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