请说一下reduce of的用法.

请说一下reduce of的用法.
最好连reduce的用法也说一下.

educe [ri'dju:s]
v.减少,分解,减低
v.归约
[ #orgreduce 过去式reduced 过去分词reduced 现在分词reducing 第三人称单数reduces 名词reducer 形容词reducible 副词reducibly ]
reduce [ri'dju:s; -'du:s]
vt.
1.减少；缩小；削减,缩减；精简：例句:They have to reduce expenses this year.
他们今年必须削减开支.2.降低；减轻：例句:She tried to reduce her weight.
她设法降低她的体重.3.将…归纳；简化：例句:We can reduce his speech to three sentences.
我们可以把他的讲演归纳成三句话.4.换算；折合：例句:If you reduce 3 lbs.to ounces,you have 48 ounces.
如果将3磅换算成盎司,可得48盎司.5.使变为：例句:The heavy artillery bombardment reduced the village to ruins.
猛烈的炮火使这个村庄变成一片废墟.His words reduced her to silence.
他的话使她哑口无言.6.把…弄碎(或熔化等)；捣碎：例句:Their daily work is to reduce the rocks to dust.
他们每天的工作就是将岩石捣碎成粉末.7.使降级；使降职：例句:He was reduced to ordinary soldier due to a serious dereliction of duty.
他因严重失职被降为普通士兵.8.降服(使有秩序等)；攻陷(城市等)：例句:The teacher soon reduced the noisy class to order.
教师很快就使这个乱哄哄的班恢复了秩序.The fortress at the entrance to the village was reduced by a sudden attack.
村口的堡垒遭到突然袭击而被攻陷.9.使处境困难(或悲惨等)；迫使,逼迫[常用被动语态]：例句:The bad harvests in the last few years reduced the peasants to extreme poverty.
过去几年的庄稼歉收使农民变得极为贫困.Poverty reduced them to begging for a living.
贫困迫使他们乞讨为生.10.使变弱；使变瘦；使衰退：例句:He is reduced to skin and bones.
他变得骨瘦如柴.11.约束；限制：例句:Business was reduced to local buying and selling when the war broke out and international trading ceased.
战争爆发国际贸易停止后,商业就只限于地方性的买卖了.12.【数学】约简：例句:The last problem is to reduce an equation to its simplest form.
最后一道题是将一方程式化简为最简单形式.13.使…浓缩变稠：例句:The last step is to add some salt and reduce the soup for three minutes.
最后一个步骤是加些盐然后使汤浓缩三分钟.14.(用油)调稀(或冲淡)：例句:We can use this special oil to reduce the thick paint to a liquid thin enough to spread easily .
我们可以使用这种特殊的油将浓油漆稀释一下,使它刷起来比较省力.15.【化学】还原；分解(化合物)：例句:Water can be reduced to oxygen and hydrogen by electrolysis.
水通过电解可以分解为氧和氢.16.【外科学】使…复位(或复原)：例句:A doctor can reduce a fracture or dislocation.
医生能使骨折或脱臼复原.17.【语音学】使(重读元音)弱化：例句:Some English vowel sounds which are not given weight in speech become reduced to a rather formless central vowel.
英语中有些元音在讲话时没有重读,结果成了相当不定型的中央元音了.18.【摄影术】减低(底片的)强度19.【生理学】使(细胞)发生减数分裂
vi.
1.减少；缩小；缩减；减弱2.(节食)减肥：例句:She has been reducing for the last few weeks.
她在最近几周一直在节食减肥.3.【化学】还原：例句:Ferrous iron reduces to ferric iron.
二价铁能还原成三价铁.4.(液体)浓缩变稠：例句:The soup will reduce by adding some cooking starch.
汤中加些淀粉将变稠.5.(油漆、颜料等)稀释：例句:Most paints reduce with turpentine.
许多油漆可用松节油稀释.6.【生物学】(细胞)减数分裂