Physicists are pretty confident dark matter exists. Astronomical observations first made in the 1930s show there is not nearly enough ordinary matter to hold galaxies together as they spin round.
其实，物理学家对暗物质的存在确信无疑，最早上世纪30年代做的天文观察就显示出要保持时刻运转的星系稳定聚集在一起远非一般性物质所能；换句话说，一个星系的可见部分一定是牢牢嵌在一种不可见的光晕上的；否则，它就会在运转过程中四分五散。
In the evening cool at a fairground on the Tripoli waterfront, giggling children chant as they spin on a merry-go-round.
的黎波里夜凉如水，在滨水区的露天广场上，孩子们坐在旋转木马上嬉笑着唱歌。
Ball physics have been redone from scratch this go round so the ball will spin, bounce and generally move how it should.
球的物理因素被重新制作，这样球将旋转，反弹和整体地按照应该的方向运行。
IN THE evening cool at a fairground on theTripoliwaterfront, giggling children chant as they spin on a merry-go-round.
的黎波里海滨游乐场的夜晚，凉风习习，孩子们坐在旋转的木马上，欢快的唱着。
The beautiful maiden took the flax from her head, wound it round the stem of a slender birch, grasped the spindle, and began to spin.
少女从她头上取下亚麻，将它绕在一根细细的白桦树枝上，抓起纱锭开始纺纱。
When you spin round and round, and stop suddenly, you feel dizzy.
当你旋转再旋转并且突然停止，你会感觉晕眩。
Spin the pendulum round by turning the red knob.
转动红色的把手使钟摆开始转动。
Meanwhile, it also discusses the influence of roll yaw on sideslip in spin, and of moving round plumb line on Angle of bank.
同时就尾旋中偏滚对尾旋侧滑的影响、绕铅垂轴旋转对坡度的影响等进行了讨论分析。
Like other planets, Mars is not perfectly round; it is flattened at the poles because of its spin.
像其它行星一样，火星不是十分圆的，由于自转，两极稍偏。
In New York, he plays not only at Spin but outdoors, with the regulars who gather year-round at the concrete tables in Tompkins Square Park in the East Village.
在纽约，他不仅在Spin打球，还会在户外，和常年聚集在东村汤普金斯广场公园(Tompkins Square Park)的水泥台子旁边的人打球。
In New York, he plays not only at Spin but outdoors, with the regulars who gather year-round at the concrete tables in Tompkins Square Park in the East Village.
在纽约，他不仅在Spin打球，还会在户外，和常年聚集在东村汤普金斯广场公园(Tompkins Square Park)的水泥台子旁边的人打球。
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