O - antigen in an important component of outer membrane of Gram - negative bacteria.抗原是革兰阴性菌外膜的重要组分.Results In those pathogen there 52 % is Gram - positive bacteria, there 48 % is Gram - negative bacteria.结果致病菌中革兰氏阳性菌占52...
If a spacecraft travels faster than 11 km a second, it escapes the earth's gravitational pull.如果飞行速度超过每秒11公里，宇宙飞船将摆脱地球的引力。He witnessed many dramatic escapes as people jumped from as high as the fourth floor...他目睹了许多...
Two knife racks hold her favourite knives.两个刀架上存放着她最心爱的刀具。You have to fight to reach the racks of clothes but the bargains are amazing.你得费力往前挤才能够到那一架架的衣服，但那些打折品的确超值。There are racks of musty clothing and piles of junk.有几架...
She wants to be wined and dined , courted and romanced.她渴望美酒和佳肴、绵绵爱意和浪漫情调.He liked beautiful women and courted them assiduously.他喜欢美女，并且对她们大献殷勤。Wherever Tom and Huck appeared they were courted, admired, stared at.汤姆和哈克两人...