Thomas Hudson was unhappy as soon as the boys were gone.孩子们刚刚离开,托马斯·赫德森就觉得闷闷不乐.The English naturalist W. H. Hudson was born in Argentina.英国博物学家W. H. 哈得逊出生在阿根廷.Thomas Hudson put the drink down in the shade and stood up.托马...
…the motorway tunnels under the Hudson river.哈得孙河下的高速公路隧道Thomas Hudson was unhappy as soon as the boys were gone.孩子们刚刚离开,托马斯·赫德森就觉得闷闷不乐.Hudson was alarmed, and asked the chief of the gnomes for an explanation.哈德森惊动了, 并且要...
Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化物而铍则不能。However the toxic properties of beryllium limit its application.然而铍的毒性限制了它的作用.Toxicity problem in manufacturing and storage might be alleviated ...