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【根】mut＝tochange（改变）
mutate
Toundergoorcausetoundergomutation.
vi. 变化，产生突变
vt. 改变，使突变
commute
Totravelasacommuter.
Tomakesubstitutionorexchange. Toserveasasubstitute.
Topayingross, usuallyatareducedrate, ratherthaninindividualpayments.
Tosubstitute (onethingforanother); exchange.
Tochange (apenalty, debt, orpayment) toalesssevereone.
Anactorinstanceofcommuting, especiallythetripmadebyacommuter:
vt. 减刑；交换；用……交换；使……变成
vi. 通勤；代偿
n. 通勤（口语）
例句：
Hissentencewascommutedfromdeathtolifeimprisonment.
他由死刑改判为终身监禁。
ShecommutesbetweenChicagoandRockfordeveryday.
她每天通勤于芝加哥和罗克福德之间。
commutation
Asubstitution, exchange, orinterchange.
Thesubstitutionofonekindofpaymentforanother. Thepaymentsubstituted.
Thetravelofacommuter.
Electricity. Conversionofalternatingtounidirectionalcurrent. Reversalofcurrentdirection.
Law. Reductionofapenaltytoalesssevereone.
n. 减刑；交换；经常来往；代偿
permutation
Acompletechange; atransformation.
Theactofalteringagivensetofobjectsinagroup.
Mathematics. Arearrangementoftheelementsofaset.
n.变更；更换；变换；重排；【数学】排列；置换
permute
Tochangetheorderof.
Mathematics. Tosubjecttopermutation.
vt. 交换；变更；排列
transmutation
Theactoraninstanceoftransmuting; transformation. Thestateofbeingtransmuted.
Physics. Transformationofoneelementintoanotherbyoneoraseriesofnuclearreactions.
Thesupposedconversionofbasemetalsintogoldorsilverinalchemy.
n. 变形；变化；演变
transmute
Tochangefromoneform, nature, substance, orstateintoanother; transform: Alchemiststriedtotransmuteleadintogold. SeeSynonymsatconvert.
Toundergotransmutation.
vt. 使变形；使变质
vi. 变形；变质
例句：
Wecantransmutewaterpowerintoelectricpower.
我们可以将水力变成电力。
Itisimpossibletotransmutebasemetalsintogold.
把贱金属变成黄金是不可能的。
趣味单词
loom
Tocomeintoviewasamassive, distorted, orindistinctimage
Toappeartothemindinamagnifiedandthreateningform
Toseemimminent; impend
Adistorted, threateningappearanceofsomething, asthroughfogordarkness.
Anapparatusformakingthreadoryarnintoclothbyweavingstrandstogetheratrightangles.
Toweave (atapestry, forexample) onaloom.
n. 织布机；若隐若现的景象
vi. 赫然耸现；可怕地出现；朦胧地出现；隐约可见；迫在眉睫
vt. 在织布机上织
例句：
Aflagpoleloomedupthroughthemist.
在薄雾中隐隐可见一根旗杆。
“Stalinloomsoverthewholehumantragedyof 1930-1933”(&b{RobertConquest})
“斯大林赫然耸现在1930—1933年整个人类的悲剧中”(罗伯特·康奎斯特)