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...
顷刻之间, 他的想象机器就使劲转了起来.His imagination - mill was hard at work in a minute, now.顷刻之间,一对蝴蝶从洞中翩然飞出.Within a couple of seconds , two butterflies flew out of hole.顷刻之间,指挥中心的六、七台电话同时投入了工作.A half - dozen phones in the operations ...
饰有球队标识的棒球帽baseball caps emblazoned with the team's logo无标识的警车an unmarked police car一种机器可以阅读的标识卡,用以识别计算机终端上的操作员.A machine - readable identification card for identifying an operator at a computer terminal....
The Doyle couple put down a good supply of meats, eggs, wine and pickles.多伊尔夫妇贮藏了许多肉 、 蛋 、 酒和泡菜.Most people eat pickles at breakfast.大多数人早餐吃腌菜.Should pickles and tomatoes go on the same shelf?泡黄瓜跟西红柿能不能放在同一层架上?Our main p...