substitution什么意思？

substitution的复数形式为：substitutions...

Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐.Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.We use saccha...

In my experience a straight substitution of carob for chocolate doesn'twork.根据我的经验，用角豆制品直接代替巧克力行不通。We use saccharin in substitution for sugar.我们用糖精代替糖.Substitution, No.3 for No.4.换人,4号下, 3号上....

substitution的音标：substitution的英式发音音标为：[ˌsʌbstɪ'tju:ʃn]substitution的美式发音音标为：[ˌsʌbstɪ'tuʃən, -'tju-]...

软骨黏液肉瘤...

patio的复数形式为：patios...

circumpapillary的音标：circumpapillary的英式发音音标为：['sɜ:kəmpəpɪlərɪ]circumpapillary的美式发音音标为：['sɜkəmpəpɪlərɪ]...

介绍完毕后她就登上讲台.She was introduced and stepped up to the podium.老师叫大宝走上讲台.The teacher called Dabao to step up the platform.在走上讲台讲演之前,我要把我的思绪整理一下.I must put my thoughts together before I go on the platform....

“力争”的英语可以翻译为：work hard for，do all one can to，argue strongly，contend vigorously，fend ...

Hermia was looking at him and wondering at his strange inconstancy.赫米亚望着他,对他莫名其妙的反复无常感到很惊奇.Hermia: Oh ! Dad! Please, he is really a perfect guy.喔, 爸爸! 请答应吧, 他真的是个完美的人.Hermia : I'm sorry , Dad! I can't be his wi...

n.罗盘，指南针，圆规，界限...

患者可能会频繁发病。The sufferer can experience frequent relapses.这种药能降低发病次数和严重程度.The drug can reduce the frequency and severity of attacks.90%的病人在6个月内会再次发病。In 90 per cent of cases the patient will relapse within six months....

brawn的音标：brawn的英式发音音标为：[brɔ:n]brawn的美式发音音标为：[brɔn]...

n.（包括附属建筑、土地等在内的）房屋或其他建筑物，（契约）前言，契据的缘起部分（记述财产的详情、当事人姓名等），（企业的）房屋建筑及附属场地，前提( premise的名词复数 )，[复数]房屋，[复数][合同、契约用语]上述各点，（逻辑学中的）大[小]前提...

adj.附属的，附加的...

在前头，预先，事先，提前，先期...

The same conversation that energizes the extravert also drains the introvert.同样的交谈能让外向者荣光焕发,却让内向者精神颓靡....

“冰期”的拼音为：bīng qī...

analgesic的音标：analgesic的英式发音音标为：[ˌænəl'dʒi:zɪk]analgesic的美式发音音标为：[ˌænəl'dʒizɪk, -sɪk]...