reduction n. 1.缩小,减少;降级,降位;(刑罚等的)轻减;减速;减价,折扣。 2.(城市、国家等的)陷落,投降,被征服、变成 (to; into)。 3.破落,没落;【物理学】衰减。 4.类别;碎矿;提炼。 5.【数学】简化,约简,缩减;化归。 6.(测量结果的)整理,(代号等的)译解;【无线电】订正。 7.【化学】还原法,改格法;【摄影】减薄。 a 10% reduction 九折。 great reductions in prices 大减价。 the reduction of armaments 裁(减)军(备)。 ascending [descending] reduction 由小[大]单位改成大[小]单位的换算法。 reduction to absurdity=reductio ad absurdum.
Preparation and performance of cu2 - ti - pillared montmorillonite modified by so2 - 4 for selective reduction of no by propene under lean - burn condition 改性钛交联蒙脱催化剂的制备与性能
Urine ? separate determination of organic , inorganic and total mercury ? selective reduction cold atomic absorption spectrometric method 甲基)汞、无机汞和总汞的分别测定方法选择性还原-冷原子吸收光谱法
Japanese patients physical decline , be selective reduction , weight loss and weak , can be associated with fever , anemia obvious , or even awareness of fuzzy , sepsis occurred but rarely see 患者体力日衰,胃纳减少,消瘦无力,也可伴发热,明显贫血,甚至意识模糊,但发生败血症者很少见。
Methods 3 , 3 - bis ( dibenzyloxyphosphoiyl ) propionic acid ( 5 ) and ( 6 ) were synthesized from tetraethyl methylene bisphosphonate via hydrolysis , chlorination of the acid , esterification , condensation , then 3 , 3 - bis ( dibenzyloxyphosphoryl ) propanol ( 6 ) was obtained via selective reduction of ( 5 ) 方法以亚甲基偕二膦酸四乙酯( 1 ) ?原料经水解、氯膦酰化、酯化、缩合得3 , 3二(二苄氧膦酰基)丙酸( 5 ) ,随后选择性硼氢化还原得3 , 3二(二苄氧膦酰基)丙醇( 6 ) 。
百科解释
Selective reduction (or multifetal pregnancy reduction or MFPR) is the practice of aborting one or more fetuses in a multifetal pregnancy, say quadruplets, to a twin or singleton pregnancy.