At night, the pupils dilate to allow in more light...到了晚上，瞳孔就会扩大以接收更多光线。At night, the pupils dilate to allow in more light.到了晚上，瞳孔就会扩大以接收更多光线。Specific expenditure includes hardware to upgrade, network management and netw...
At night, the pupils dilate to allow in more light.到了晚上，瞳孔就会扩大以接收更多光线。The lungs dilate when breathing.呼吸时肺部扩张.Specific expenditure includes hardware to upgrade, network management and network dilate.具体花费包括硬件升级 、 网络管理以及网络...
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....
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...