用阿基米德螺线能成功地解决化圆为方的问题,方法很简单.A neat solution of the quadrature problem can be achieved with the spiral of Archimedes.现在的密封槽型比较常用的是对数螺线槽.Now the commonly used seal groove is a logarithm spiral groove.螺线齿轮被用于传送在平行的轴之间的行动.Hel...
These large institutions make — and change—the rules to suit themselves.这些大机构总是随意制定规定，而且说变就变。1998 was an important year for everyone: a time of change.1998年对所有人来说都是重要的一年：那是个变革的时期。Eisenhower used his muscle to persuade Co...
他们驱车回家，一路上挡风玻璃上的雨刮器不停地呼呼刮着。They drove home with their windshield wipers going whoosh whoosh.接连下了七八天雨, 屋子里什么都是潮呼呼的.After a week's rain, everything in the house became damp and clammy.他们都伤风了,呼呼喘气而且打喷嚏.They all had col...