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 ).Objective The study of effect of Diisop...
The wings were at right angles to the line of flight.机翼与航线成直角。Due to different angles, there might be overrules, please don't mind.比赛中有时改判, 请大家不要介意,角度不同嘛....dusty photographs hanging at cockeyed angles on the walls....
The Doberman let out a string of roaring barks.短毛猎犬一阵狂吠。Laura let out the clutch and pulled slowly away down the drive.劳拉松开离合器踏板，沿车道慢慢驶离。Something brushed past Bob's face and he let out a yell.有什么东西从鲍勃的脸上扫过，他大叫了一声。...