reduction

reduction
noun
[mass noun]
  1. the action or fact of making a specified thing smaller or less in amount, degree, or size
    缩减,降低
    talks on arms reduction.
    削减武器谈判。
    [count noun]there had been a reduction in the number of casualties.
    伤亡人数已经减少。
    ■[count noun]the amount by which something is made smaller, less, or lower in price
    (数量)削减;减价
    special reductions on knitwear.
    针织品特价。
    ■the simplification of a subject or problem to a particular form in presentation or analysis
    归纳,简化
    the reduction of classical genetics to molecular biology.
    将古典遗传学归结为分子生物学。
    ■(Mathematics)the process of converting an amount from one denomination to a smaller one, or of bringing down a fraction to its lowest terms
    (数)简化,缩减,约化;归约
    ■(Biology)the halving of the number of chromosomes per cell that occurs at one of the two anaphases of meiosis
    (生)染色体减半
  2. [count noun]a thing that is made smaller or less in size or amount, in particular
    规模(或数量)被减少之物,尤指
    ■an arrangement of an orchestral score for piano or for a smaller group of performers
    简编曲(管弦乐改编的钢琴曲或小乐队演奏曲)
    ■a thick and concentrated liquid or sauce made by boiling
    浓汤,浓汁
    ■a copy of a picture or photograph made on a smaller scale than the original
    (照片,画)缩小版
  3. the action of remedying a dislocation or fracture by returning the affected part of the body to its normal position
    脱臼(或断骨)复位
  4. (Chemistry)the process or result of reducing or being reduced
    (化)还原;被还原
  5. (Phonetics)substitution of a sound which requires less muscular effort to articulate
    (语音)弱化
    the process of vowel reduction.
    元音弱化。
语源
  1. late Middle English (denoting the action of bringing back): from Old French, or from Latin reductio(n-), from reducere 'bring back, restore' (see reduce). The sense development was broadly similar to that of reduce; sense 1 dates from the late 17th cent
英语宝典
考试词汇表