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...
Paul woke early, as was his wont.保罗醒得很早，历来如此。He was wont to fall asleep after supper.他老是吃完晚饭就打盹。He was wont to say that children are lazy.他常常说小孩子们懒惰....
Coughs and sneezes spread infections much faster in a warm atmos-phere.在温暖的环境中，咳嗽和喷嚏传播疾病的速度要快得多。Infections are more likely in those suffering from malnutrition.营养不良的人更有可能被传染。Coughs and sneezes spread infections.咳嗽和打喷嚏会传播...
The IGAD region covers Djibouti, Eritrea, Ethiopia , Kenya, Somalia, Sudan, and Uganda.伊加特所辖区域包括吉布提, 厄立特里亚, 埃塞俄比亚, 索马里, 苏丹和乌干达.The end result was that the ship had to turn round, and go back to Djibouti.最后的结果是这艘船不得不掉转方向，...
He hoped to strike it rich by investing in ginseng.他希望通过投资人参发大财。Even if sales have plateaued , the ginseng teas are doing well.即使销售额不变的话, 人参茶也是有不错的表现的.The word 'ginseng' comes from the Chinese word 'ren-sh...
老农抚摩着起皱纹的脸。The peasant is palming his wrinkled face.她的眼睛周围起皱纹了。She was corrugated round her eyes.聚集或收缩使起皱纹或折子;有皱纹.A small fold or pucker made by gathering cloth....