We often denote danger by red letters.我们常常用红字表示危险.Red eyes denote strain and fatigue.眼睛充血表明压力过大、身心疲惫。Sometime the term artesian is used to denote a confined aquifer.有时候人们也用自流含水层这一术语表示承压含水层....
The feasibility that the concentration of anthracene can be determined by thermal lens technique.讨论了热透镜技术对紫外光作用下能产生荧光的物质多环芳烃蒽的检测.The derivates of naphthalene, fluorene, pyrene, anthracene, acenaphthene and their applicat...