We tried to grow some copper sulphate crystals with our children.我们想跟孩子们一起制作硫酸铜晶体。Adding sulphate to the solution will give a precipitate.将硫酸盐加入该溶液会产生沉淀.More ammonium sulphate solution is being recovered in the process o...
Massage is used to relax muscles, relieve stress and improve the circulation.按摩可以使肌肉放松，缓解压力和促进血液循环。Peppermint leaves are believed to relieve tiredness and nasal stuffiness.据信薄荷叶可以减轻疲劳和鼻塞。At seven o'clock the night n...
In a naval battle your aim is to sink the enemy's ship.在海战中目标就是击沉敌船。Make sure the draining board, sink and plug hole are regularly disinfected.滴水板、水槽和塞孔一定要定期消毒。She went to the sink and ran water into her empty glass...