Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水楊酸和乙酸酐為原料,采用無水碳酸鈉作為催化劑經(jīng)O - ?；磻?yīng)合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...

n.觸媒，催化劑，〈比喻〉觸發(fā)因素，促進(jìn)因素，〈口〉有感染力的人...

catalyst的音標(biāo)：catalyst的英式發(fā)音音標(biāo)為：['k?t?l?st]catalyst的美式發(fā)音音標(biāo)為：['k?tl?st]...

catalyst的復(fù)數(shù)形式為：catalysts...

Read these notes carefully and keep them for future reference.仔細(xì)閱讀這些注釋并將其保留下來以備將來之用。They exchange traveller's cheques at a different rate from notes.他們兌換旅行支票時依據(jù)的匯率跟兌換現(xiàn)鈔時不同。Watson has a wonderful voice, with thrillin...

esprit的音標(biāo)：esprit的英式發(fā)音音標(biāo)為：[es'pri:]esprit的美式發(fā)音音標(biāo)為：[es'pri]...

兩盤目...

“洞察”的拼音為：dòng chá...

“司法”的拼音為：sī fǎ...

A blade guard is fitted to protect the operator.為保證操作人員的人身安全安裝了槳葉保護(hù)罩。A sharp blade is likely to nick the skin and draw blood.鋒利的刀刃可能會劃傷皮膚，導(dǎo)致出血。The soil sticks to the blade and blocks the plough.土粘在犁鏵上，卡住了犁。...

hypercone的音標(biāo)：hypercone的英式發(fā)音音標(biāo)為：['ha?p?k??n]hypercone的美式發(fā)音音標(biāo)為：['ha?p?ko?n]...

The effect of nitrogen can be overcome by sheathing the flame in argon.氮的影響則可以通過用氬氣包覆火焰而予以克服.Used for testing horizontal combustibility of various textile and show with flame spread rate.用于測定各類紡織織物水平方向燃燒性能,并以火焰蔓延速率來表示.Th...

俄別以東和耶希亞也是約柜前守門的.Obed - Edom and Jehiah were also to be doorkeepers for the ark.于是將以色列神的約柜運(yùn)到那里去.And they carried the ark of the God of Israel about thither.他們就把神的約柜送到以革倫.So they sent the ark of God to Ekron....

戰(zhàn)爭顛倒是非：殺戮與殘忍成了美德。War turns morality inside out: killing and cruelty are virtues.甘地體現(xiàn)了克己、禁欲和自我約束的美德。Gandhi exemplified the virtues of renunciation, asceticism and restraint.謙虛被認(rèn)為是一種美德。Humility is considered a virtue....

“嚴(yán)”的近義詞/同義詞：厲, 苛。...

“投毒”的拼音為：tóu dú...

“可贖的”的英語可以翻譯為：[法] expaiable，expiable ...

Michigan的音標(biāo)：...

“皮上層”的拼音為：pí shàng céng...