He used to be one of the professors at the School of Education...他曾是教育学院的一名教授。I reflected on the relative importance of education in 50 countries.我思考了50个国家相对而言对教育的重视程度。Britain did not introduce compulsory primary educati...
Sedimentary facies include river bed , alluvial flat, neritic , river mouth and limnetic, littoral, weathered continental drift bed and flood deposit facies.沉积相主要有河床相 、 河漫滩相、浅海相 、 河口湾相、湖沼相 、 滨海相和陆相坡积洪积风化红土等7种类型,它们的分布与古河谷...
大西洋北部的一种海鸟, ( 刀嘴海雀 ) 羽毛 黑白 兼杂,喙扁平且有白圈.A sea bird ( Alca torda ) of the northern Atlantic, having - and - white plumage and a white - ringed , flattened bill.北部海域的蹼足潜水海鸟;海雀;角嘴海雀;海雀科鸟;海鸠;等.Any of various small auks ( genus...
Taken in excess, aluminum - containing antacids cause hypophosphatemia, which may lead to metabolic bone disease.如果摄入过量, 含铝的抗酸剂可以导致低磷血症, 而低磷血症可以导致代谢性骨病....