A method of synthesis of butyl isobutyrate catalyzed by amidosulphonic acid has been studied.以氨磺酸为催化剂催化合成了异丁酸丁酯,确定了酯化优化条件....

n.（指状态）骨折( fracture的名词复数 )，断裂，（指事实）骨折v.（使）折断，破碎( fracture的第三人称单数 )...

crack up的音标：crack up的英式发音音标为：[kræk ʌp]crack up的美式发音音标为：[kræk ʌp]...

grating的音标：grating的英式发音音标为：['greɪtɪŋ]grating的美式发音音标为：['ɡretɪŋ]...

brash的最高级为：brashest...

n.美术字（体），书法，笔迹...

v.使一体化( integrate的现在分词 )，使整合，使完整，使结合成为整体...

perforating的音标：perforating的英式发音音标为：['pɜ:fəreɪtɪŋ]perforating的美式发音音标为：['pɜfəreɪtɪŋ]...

mercuderamide的音标：mercuderamide的英式发音音标为：[mɜ:k'ju:dərəmɪd]mercuderamide的美式发音音标为：[mɜk'judərəmɪd]...

n.雕刻师，雕刻刀，錾刀，刻具...

Prisms providing deviations ranging from about 15� � to roughly 45� � are available commercially.市场上能买到的棱镜的偏转角大约从15°到45°.Inter - satellite ranging is crucial in Gravisat and autonomous navigation.星间测距是重力测量卫星和卫星自主导航的关键技术....

agglomerant的音标：agglomerant的英式发音音标为：[ə'glɒmərənt]agglomerant的美式发音音标为：[ə'glɒmərənt]...

lateral的音标：lateral的英式发音音标为：['lætərəl]lateral的美式发音音标为：['lætərəl]...

反称笔石科...

hydrometra的音标：hydrometra的英式发音音标为：[haɪdrə'mi:trə]hydrometra的美式发音音标为：[haɪdrə'mitrə]...

transcends的音标：...

In the post - Watergate era, power has been fractionated on Capitol Hill ( Evan Thomas )在水门事件之后的时代里, 权力已被国会分割 ( 埃文托马斯 )The relative molecular mass of chitosan fractionated by wave was measured by the light scattering met...

lasurapatite的音标：lasurapatite的英式发音音标为：['læsərəpətaɪt]lasurapatite的美式发音音标为：['læsərəpətaɪt]...

This bond of kin represented the real basis of the confederacy.这种血缘亲属关系是联盟的真实基础。" Don't you go throwing the Confederacy in my face!" 你犯不着用南部联盟来压我嘛!The windows smiled, the door coaxed and beckoned, the creeper blushe...

Objective : To study the feasibility of spermatogonial stem cell allotransplantation.目的: 研究同种生精干细胞移植的可行性.Limb allotransplantation is an important procedure for reconstruction of limb defects.同种异体肢体移植是解决肢体缺损的重要方法,本文阐述了该项技...

Steffi Graf claimed a fourth Wimbledon title in 1992.施特菲·格拉芙于1992年第4次赢得温布尔登桂冠。Graf looked in awesome form as she cruised to an easy victory.格拉芙轻松取胜，看上去状态极佳。At the end, Graf punched the air in delight, a huge grin on her ...

The kids who are joyriding and ram-raiding are unemployed.那些开偷来的车狂飙和驾车抢劫的年轻人都是无业游民。The English, worried by the growing power of Prince Henry, sent a raiding party to Scotland to kill him.英格兰人对亨利亲王权势日增感到不安，便派突袭队到苏格兰除掉他。Pr...

Accra的音标：Accra的英式发音音标为：[ə'krɑ:]Accra的美式发音音标为：['ækrə, ə'krɑ]...

n.大地电流测定器...

反跟踪...

graduations的音标：...

brachia的音标：brachia的英式发音音标为：[b'reɪkɪə]brachia的美式发音音标为：[b'reɪkɪr]...

adj.能水合的...

Inter - satellite ranging is crucial in Gravisat and autonomous navigation.星间测距是重力测量卫星和卫星自主导航的关键技术....

'Where've you put it?' he rasped...“你把它放在哪里了？”他尖声叫道。"Where've you put it?" he rasped.“你把它放在哪里了？”他尖声叫道。Foden rasped a hand across his chin...福登用手蹭得下巴刺刺响。Sabres rasped from scabbards and the horsemen sp...