Astronomers have discovered a distant galaxy.天文学家们发现了一个遥远的星系。The Galaxy consists of 100 billion stars.银河系由1,000亿颗恒星组成。The spaceman flew through the galaxy at the speed of light.太空人以光速穿越银河系.We report Chandra observations ...
The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces.作者证实:单叶双曲面和双曲抛物面是直线曲面.The mathematical model of the hyperboloid twist drill was introduced.介绍了以旋转单叶双曲面作麻花钻钻尖后刀面的数学模型.The...
旨在缓解失业冲击的项目进展得并不太顺利，参议员萨班斯对此表示关切。Senator Sarbanes expressed concern that programs designed to soften the blow of unemployment are not working well.我们可以想像检波器受几万个砂粒冲击的情景.We can imagine a seismic detector being bombarded by...