英国有170万失明和视力受损人口。There are 1.7 million blind and visually impaired people in Britain.他将失明的双眼转向他们，低声打了个招呼。He turned his sightless eyes their way and boomed out a greeting.在受污染严重的地区，有一半人口失明。In heavily infected areas, half ...
Remember to be tactful when expressing a personal judgement.记住表达个人看法要婉转.I decided it wouldn't be tactful to order another beer.我想了想，觉得再要啤酒就有点过分了。He had been extremely tactful in dealing with the financial question.....
石墨甚至其线性物 聚苯,过于不溶, 不溶和发脆.Graphite and even its linear counterpart, poly ( p - phenylene ) are too insoluble, infusible, and brittle.结果表明,B值较客观地反映了纸质发脆的程度.The results show that B - value can objectively measure the degree ...