Purification of 2,6 dichlorotoluene by the recrystallization method without solvent was studied.研究了用无溶剂重结晶法提纯2,6二氯甲苯.Taking p chlorotoluene as raw material , 2,4 Dichlorotoluene was synthesized via catalytic chlorination...
They accurately predicted solar eclipses.他们精确地预告了日蚀.Many predicted a bleak future.很多人都预测前景暗淡。Meteorologists have predicted mild rains for the next few days.气象学家预测接下来的几天有小雨。They also predicted using genetics alone many of...
Politicians are usually careful not to ruffle the feathers of their constituents.政治家们通常都很小心，避免激怒了他们的选民。Wreaths are woven of wool, feathers, or even human hair.还有人将羊毛 、 羽毛 、 甚至头发编织成花环.She looked down at her Viennese fan o...
The nonlinear kinetic characters of landslip action are complex, exoteric and dissipated.滑坡行为表现为复杂的 、 开放的和耗散的非线性动力学演化特徵.Through exoteric and esoteric sources, we know that the Nazarene Master fulfilled his spiritual miss...