diethyl是什么意思？

N, N - Diisopropylethylamine ( DIPEA ) was prepared from diisopropylamine ( DIPA ) and diethyl sulfate ( Et _ 2 SO _ 4 ).以二异丙胺 ( DIPA ) 、硫酸二乙酯 ( Et2SO4 ) 为原料合成N, N二异丙基乙基胺 ( DIPEA ).RP - HPLC absolute calibration curve me...

Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.收率相对于丙二酸二乙酯达到了80%以上.The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was sy...

diethyl的音标：diethyl的英式发音音标为：[daɪ'eθɪl]diethyl的美式发音音标为：[daɪ'eθɪl]...

“茅草”的拼音为：máo cǎo...

We're trying to establish linkages between these groups and financial institutions.我们正努力在这些团体和金融机构之间建立联系。He explored the wound with his finger, trying to establish its extent.他用手指摸了摸伤口，想要确定受伤的程度。His opportunity to r...

acerebral的音标：acerebral的英式发音音标为：['eɪseəɪbrəl]acerebral的美式发音音标为：['eɪserɪbrəl]...

在北方,他们自己的山林繁茂地生长起来了.In the north their own wooded hill rose up....

Jeans a powerful egalitarian message, but are far more likely to a sartorial deathtrap for politicians.政客们穿上牛仔裤是传递亲民的讯息, 但也更容易犯穿衣禁忌.The soldiers had to remain in a deathtrap salient for most of the rest of the war.随后的战争中...

grant的音标：grant的英式发音音标为：[grɑ:nt]grant的美式发音音标为：[grænt]...

施工人员将不得不另外用木料加固现有的托梁。The builders will have to strengthen the existing joists with additional timber.他的头碰到了低梁上。He bumped his head on the low beams.木梁高高支撑着的天花板a high beamed ceiling...

return的现在完成时为：returned...

Gyroscopes are used in navigational instruments for ships, aircraft, and spacecraft.陀螺仪用于船舶 、 飞机和宇宙飞船中的导航设备.The principle, characteristics, classification and key technologies of fiber - optic gyroscopes are summarized.综...

adj.无畏的，大胆的，不怕的...

不对称菌素...

postcard的复数形式为：postcards...

“韦克姆”的英语可以翻译为：Wakeham [英格兰人姓氏] 住所名称，来源于古英语，含义是“警醒的+宅地”(wakeful+homestead) ...

Liangmen的音标：...

The more powerful the car the more difficult it is to handle.汽车的功率越大，就越难驾驭。Any experience can teach and strengthen you, but particularly the more difficult ones...任何经历都能使你从中受益并让你变得坚强，而那些比较艰难的经历尤其如此。It is, on the face of ...