战斗在傍晚时分打响，持续了一夜。The fighting began in the late afternoon and continued all night.直到昨天傍晚6点40分，马丁微弱的呼救声才被人听到。Martin's weak cries for help went unheard until 6.40pm yesterday.除了偶尔一两个傍晚出来散步的人，雾蒙蒙的街上空荡荡的。The foggy street...
节制: 食不可过饱, 饮不得过量.Temperance: Eat not to dullness; drink not to elevation.人们体重经常是因为吃得过饱而增长.可是为什么会吃过饱 呢 ?People usually gain weight because they overeat, but what makes them overeat?总是吃得过饱不利于健康.It is not good to our health...
The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.The doppler frequency is a function of the two scattering directions.多普勒频率是两个散射方向的函数.Doppler - sonar is a dead - reckoning system.多...