For example, the incidence of diarrheal diseases may be an important indicator of environmental problems.举例, 集体腹泻是出现环境问题的重要征兆.Cholera is an acute, diarrheal illness caused by infection of the intestine with the Vibrio ch...
Normally a point in space is identified by means of coordinates.空间中的点通常是依靠座标来定位的.We carry out a transformation to spherical polar coordinates.我们变换成球极坐标.For a system, Hamiltonian is invariant under any translation of spat...
She sidled up to me and whispered something in my ear.她悄悄走上前来，对我耳语了几句。She sidled out of the crowded room.她悄悄地侧身走出那挤满人的房间.Hurstwood nerved himself and sidled near.赫斯渥鼓起勇气,侧身走近了他....
解释为什么钡能形成过氧化物而铍则不能。Explain why barium forms peroxide but beryllium does not.然而铍的毒性限制了它的作用.However the toxic properties of beryllium limit its application.但如果用铝包覆铍,则可避免加工过程中及储存期间的中毒问题.Toxicity problem in manufacturing and...
Eugene was concocting Rossini Cocktails from champagne and pureed raspberries.尤金当时正在用香槟和覆盆子酱调配罗西尼鸡尾酒。We had raspberries and cream for dessert.我们甜点吃奶油木莓子.His victory was announced to a chorus of raspberries.当宣布他获得胜利的时候,人们...