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...
Figure 3 : trace loss with FR - 4 and Roger dielectrics.[图3:FR-4与罗杰的绝缘损耗轨迹表].Roger Kingdom set the world record of 12.92 seconds...罗杰·金德姆创造了12.92秒的世界纪录。Now, now Roger, I'm sure you didn't mean it but that remar...
The ship was rolling and pitching heavily in the rough sea.船舶在狂涛中簸荡.The ship is pitching and rolling in what looks like about fifteen foot seas.这只船在看起来约有15英尺高的海浪中上下左右颠簸。He was pitching the ball.他正在投球.They don't want...
These thumps are replaced by thrills when valvular insufficiencies or stenoses or congenital defects are present.这些撞击在瓣膜闭锁不全或狭窄,或者有先天性缺损时被震颤所代替.Valvular heart disease, usually aortic and mitral insufficiency, can complic...
There was a diabolic gleam in his eyes as if something amused him greatly.那时他眼里闪耀着一丝残忍的光辉,仿佛有什么叫他大为高兴似的.In the light from the hall, her hair had a golden gleam.在大厅灯光的照射下，她的头发闪着金色的光芒。A few faints gleam of sunshine lit up ...