methylpyridine什么意思？

methylpyridine的音标：methylpyridine的英式发音音标为：[meθɪlpɪ'raɪdaɪn]methylpyridine的美式发音音标为：[meθɪlpɪ'raɪdaɪn]...

The reaction conditions on oxidation of 2 - methylpyridine to 2 - acid by oxidation of potassium dichromate were studied.研究了以2-甲基吡啶为原料,以重铬酸钾为氧化剂,利用化学氧化法合成 2- 吡啶甲酸的反应条件....

cottons的音标：...

“零”的反义词：整。...

[电] 见magnification...

It has fared well [ ill ] with him.他境况很顺利 [ 不顺利 ].She fared plainly.她吃得很简单。I think I fared quite well in the interview.我觉得我这次面试情况不错.After taking a drubbing last year, emerging markets fared particularly well.在经受去年的打击之后, ...

The house was burglarized while its occupants were asleep.这房子在屋里人睡觉时被盗.Most of the occupants had left before the fire broke out...大部分住户在火灾发生前就已经离开。Most of the occupants had left before the fire broke out.大部分住户在火灾发生前就已经离开...

infrasplenic的音标：infrasplenic的英式发音音标为：[i:nfrəsp'lenɪk]infrasplenic的美式发音音标为：[infrəsp'lenɪk]...

“球卵”的拼音为：qiú luǎn...

They sell materials for DIY mosaics and ready-made panels.他们出售自己动手做镶嵌画所需材料和现成的镶板。The panel shows marked similarities with mosaics found elsewhere.这块嵌板和在其他地方找到的镶嵌图案有明显的相似之处.Viruses are often classified into broad categori...

keep sth to oneself的音标：...

He is a pigheaded [ bullheaded ] person.这人真 拧.He's one Bullheaded old bastard.他是个顽固的老家伙.The kid has been obstinate and bullheaded from his childhood.这孩子从小就倔,有一股牛性子....

n.热烈，热情...

Sierra的复数形式为：sierras...

v.当心（beware的第三人称单数形式）...

“蝉”的拼音为：chán...

Carbonate rocks are predominantly composed of intra - clastic dolostone, chert dolostone and sand - bearing dolostone.碳酸盐岩以内碎屑白云岩 、 燧石白云儿和含砂白云岩为主.In clastic sediments, particle size is an important factor.在碎屑沉积物中, 颗粒大小是个...