He had been riding in Hyde Park, but felt unwell as he was being driven back to his office late this afternoon.他一直在海德公园骑自行车，后来感到不舒服，近黄昏时被人开车送回办公室。When we are tired, tense, depressed or unwell, we feel pain much more...当我...
Ruth listened and started nervously at every passing footstep.露丝谛听着,每次有脚步声过去她就心惊肉跳.I listened for a footstep.我留心听着脚步声.The store is just a footstep away.那爿店仅一步之遥....
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...