Acid - leaching reactor is the key instrument for preparing poly aluminium chloride ( PAC ) from kaoline.酸浸反应器是高岭土制备聚合 氯化铝 (PAC ) 的重要设备.The original burnt whiteness of Beihai kaoline is 76 % ~81 %, the whiteness subject ...
Nowadays, only the two big houses remain roofed.现在，只有那两座大房子还有屋顶。They roofed the house with slates.他们用石板瓦做屋顶.The building is roofed entirely with translucent corrugated plastic.这座建筑完全用半透明瓦楞塑料封顶。...
驾船和开车不是一回事。Driving a boat is not the same as driving a car.库克船长驾驶的船安全出航100次无事故。Captain Cook safely navigated his ship without accident for 100 voyages.我期盼的一件事就是在剑桥乘坐平底船畅游。The one thing I look forward to is going punting ...
He searched the skies for enemy bombers.他在空中搜寻敌军轰炸机。Our bombers have knocked out the mobile launchers...我们的轰炸机摧毁了移动火箭发射台。The bombers will go in soon.轰炸机很快就要出动。The bombers had conducted a 300 - mile search, quartering and...