Based on the experience, the authors set forth a series of practical methods for electroen ˉ cephalograpns verification. 本文作者结合多年的实际工作经验, 研究总结出一套实用的脑电图机检定方法,以供参考.
是地心吸引力使苹果下落.It is gravitation that causes the apple to fall.物体脱手即向地心方向跌落是由于重力吸引的缘故.Anything that is dropped falls towards the centre of the earth because of the pull of gravity.“ 你们连气候或者地心吸力都还没法控制.'You don't ev...
焦炭是一种很经济的燃料,可是燃烧后剩下很多灰.Coke is an economical fuel but it leaves a lot of ash.焦炭被用作燃料和制造钢铁.Coke is used as fuel and in making steel.达比一直在寻找改善铁质的方法，他猛然想到可以不用木炭熔炼，而改用焦炭。Darby was looking for a way to improve iron when he hi...
Young people came from the four corners of the nation.全国各地的年轻人都来到这里。The nation's unemployment rate has been climbing steadily since last June.自去年6月以来，该国的失业率一直在不断上升。He barnstormed across the nation, rallying the peop...
箭猪身上长满了刺.A porcupine is covered with prickles.美洲箭猪,豪猪:几种带刺动物中的一种, 如豪猪,类似刺猬.Any of several spiny animals, such as the porcupine that are similar to the hedgehog....
Bright blues, hot pinks, purples and greens.耀眼蓝色, 热情粉红, 还有紫色及绿色.Dark reds and purples are bold colors that make me feel strong and sassy.深红与紫色是大胆的色彩,使我感到有力量并活力充沛....