在 1691年 的《学报》中詹姆士?伯努利推导出跟踪曲线的方程.In the " Acta " of 1691 James Bernoulli derived the equation for the tractrix.伯努利是个瑞士科学家,曾于1752年为轮船的螺旋浆绘制图纸.Bernouili was a Swiss scientist who described a screw for ships in 1752.采用满足伯努利分...
The Galactic Dust in Corona Australis: Two blue - reflection nebulae.南冕座星尘内,两个星云焕发着梦幻般的蓝色光辉.aurora australis南极光OBJECTIVE : To establish an assay of quercetin and kaempferol in the seeds of Cuscuta australis R.目的: 建立南方菟丝子...
一位女职员得了流感。One of the office girls was down with the flu.特迪咂了咂舌头，活像个不以为然的英国女舍监。Teddy clucked his tongue like a disapproving English matron.他过去曾与许多女演员和女小说家调情。In the past he dallied with actresses and lady novelists....