A hydrocracking catalyst with high selectivity to middle distillates was developed.开发了一种具有较高的中油选择性的加氢裂化催化剂.Abstract: Typical failures in domestic fixed bed hydrocracking uni t over the years were summarized.文摘: 总结了我国固定床加...
A hydrocracking catalyst with high selectivity to middle distillates was developed.开发了一种具有较高的中油选择性的加氢裂化催化剂.Abstract: Typical failures in domestic fixed bed hydrocracking uni t over the years were summarized.文摘: 总结了我国固定床加...
He was already buffing the car's hubs.他已经在擦汽车轮毂了。I greased front and rear hubs and adjusted the brakes.我在前后轮毂上都抹了润滑油，还调校了刹车。Shafts and hubs are usually fastened together by means of keys.轴和轮毂通常用键固定在一起....
He dragged a foot when he walked, a leftover from polio.他走路时一瘸一拐的，那是小儿麻痹的后遗症。He wore leg braces after polio in childhood.他幼时得过小儿麻痹症后双腿安上了支架。Polio was then endemic among children my age.那时小儿麻痹症在我这个年纪的孩子中很常见。...
The extra field cultivated meant a proportionate increase in work.额外开发土地意味着工作量相应增加。The cost of the ticket is proportionate to the distance you travel.票价和旅行的距离是成比例的.The number of accidents is proportionate to the increase...
他经常与几个臭名昭著的毒贩鬼混。He regularly consorted with known drug-dealers.我愿他不再在城里鬼混,追逐妙龄少女.I wish he would stop chasing around the town after young women.不要与有夫之妇鬼混.Don't fool around with another man's wife....
约30%的肠球菌高耐庆大霉素.Approximately 30 % of Enterococcus exhibited high - level gentamicin resistance.〔结论〕卡那霉素ELB培养基是一种简便、有效的分离肠道肠球菌的选择培养基.Conclusion 〕 kanamycin ELB is a convenient and effective selective medium to isolate ent...