The refractory insulating bricks were produced , taking alumina, soft clay, cyanite al as raw materials.以工业氧化铝 、 结合粘土 、 蓝晶石等为原料,应用聚苯乙烯球烧先注和可塑成形法研制成功了耐火隔热砖....
还可引入三个缺陷能级:氧空位E_ 1(E_ c - 0.17ev) 、 双空位E_2 ( E_ c-0.23eV ) 和E_3(E_c-0.39eV).The resultsdemonstrat that three electron trape ( E _ c - 0.17 eV , E _ c - 0.23 eV, E _ c - 0.39 eV ) produced inp ￣ + nn ￣ + structures are ch...
He is being constantly monitored with regular checks on his blood pressure.他被实时监测，定时量血压。George struggled wildly, going under and resurfacing at regular intervals.乔治疯狂地挣扎，不断在水面上浮浮沉沉。Make a point of backing up your files a...
I can lose a few pounds without resorting to daft diets.我不用疯狂地节食也能减轻几磅。95 per cent of these diets do not work.这些节食方法95%都不起作用。They are trained nutritionists who can give sound advice on diets.他们都是受过训练的营养学家，能够在饮食方面提出合理的建议。...
He has written a batch of very samey tunes.他写了一组非常单调枯燥的曲子。She made a batch of her special oatmeal cookies.她烤制了一炉拿手的燕麦甜饼.The cost is not sensitive to the batch size.价格不因整批尺寸的变化而发生波动....