Antioxidant tertiary butyl hydroquinone was prepared by hydroquinone and tertiary butyl alcohol.由对苯二酚与叔丁醇反应制得抗氧化剂叔丁基对苯二酚.They were good catalyst for synthesis of n - butyl cinnamate.它们是催化合成肉桂酸正丁酯的良好催化剂.A method of synthe...
Now, let's return to the factorial function.现在，让我们回到阶乘函数上来。The modeling of microcircuit process equipment is investigated using fractional factorial experimental design and data transformation.利用部分要因试验设计与数据转换表征微电路工艺...
And It'shall laugh in the sun and It'shall be deathless.它将在阳光中放声高笑,它将永生不灭.The letter was written in his usual deathless ( ie bad , unmemorable ) prose .他这封信是用其万世不变的 笔调 写成的.Only the deity of the ruined temple re...
The name Sahara conjures up images of a desert of aridity."撒哈拉"这个名字使人想起干旱的沙漠情景....the great nomadic tribes of the Western Sahara.西撒哈拉伟大的游牧部落...the barren wastes of the Sahara.贫瘠的撒哈拉沙漠The Sahara Desert is a natural barrie...
There are problems in recruiting suitably qualified scientific officers for NHS laboratories.很难为国民医疗保健系统的实验室招募到资历合适的高级科研人员。He recently vacated his post as NHS Personnel Director.他最近辞去了国民保健署人事主管一职。This vaccine is not norm...
将金属压进钢型中以使金属成型的过程.A forming process that presses metal into or through cold drawn wire.金属底版有铅空排版 、 浇铅版、钢型刻版 、 钢板刻版等多种.Metal bottom slab has empty interpuntion, cast - in - print of a type of block , steel , steel block....