They built a triumphal arch to memorialize their victory.他们建了凯旋门来纪念胜利.But that's the least of his efforts to memorialize the sub.但是,他为纪念潜艇所作的努力远远不限于此.People plan to carve a stone to memorialize the tsunami victims.海...
A methane molecule is composed of one carbon atom attached to four hydrogens.甲烷分子由1个碳原子与4个氢原子构成。Those that are aligned in the place are called equatorial hydrogens.那些在平面上定向的氢叫做平伏氢.Those that are aligned perpendicular to ...
Epithelium can also bear cilia.上皮也可长纤毛.Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses.健康的皮肤, 粘膜和纤毛是许多病毒的天然屏障.The cilia are longer and less regular than the microvilli of a striated border...