allylation的音标

They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应....

烯丙基化（作用）...

平型刷头完美塑造婴儿般绒羽美睫.Flat side to build up baby lashes.常见的过敏原包括花粉, 动物皮屑, 绒羽, 螨类, 化学品, 以及各种食品.Common allergens include pollen, animal dander, down feathers, mites, chemicals, and a variety of foods....

飞机的两个机翼遭受撞击折断了。The two wings of the aircraft broke off on impact.科林头上的那些伤口只能是用头撞击时造成的。The cuts on Colin's head could only have been made by head-butts.当巨大物体撞击地球时，就会产生凹坑。When a large object impacts the Earth, it make...

“忧愁”的反义词：喜悦, 爽朗, 畅快, 开朗, 欢乐, 痛快, 高兴, 欢欣, 欣喜, 快活, 欢快, 欢畅。...

swear的音标：swear的英式发音音标为：[sweə(r)]swear的美式发音音标为：[swer]...

adv.专心致志地，全神贯注地...

n.边( edge的名词复数 )，优势，（悬崖、峭壁的）边缘，锋利...

它可能是通过基岩的腐蚀和崩解就地生成的.It may develop in place by the decay and disintegration of bedrock.风化作用通过分解和崩解准备了要搬运的岩石.Weathering prepares the rock for transport by decomposing and disintegrating it.这种现象被称为春季崩解.This phenomenon is c...

aviate的一般过去时为：aviated...

Your diet – avoiding constipation helps to both prevent and treat haemorrhoids.饮食,避免便秘对痔疮的预防和治疗都有好处.The haemorrhoids are removed using a scalpel, laser or staple gun.然后术者用手术刀或激光或是特殊的钳子将痔切除.Objective : To evaluate the out...

languish的现在进行时为：languishing...

He moved his menacing bulk closer to the table.他把自己骇人的庞大身躯向桌子挪近了些。The strong dark eyebrows give his face an oddly menacing look.两道浓黑的眉毛使他的脸看起来异常凶狠。She had a slightly menacing manner.她的态度有点吓人....

defraudation的音标：defraudation的英式发音音标为：[dɪfrɔ:'deɪʃn]defraudation的美式发音音标为：[dɪfrɔ'deɪʃn]...

caution的反义词有：carelessness。n.caution的反义词（小心,谨慎）：carelessness。...

implies的音标：...

unbelievable的近义词/同义词有：questionable, dubious, doubtful, incredible, suspicious, unconvincing, questionable, marvelous, incredible, absurd, doubtful, amazing, unthinkable, suspicious, inconceivable, signal, fishy, unconvin...