夏鸾翔是晚清较早研究微积分的中算家，据其《致曲术》、《万象一原》，可知他在二次曲线求积问题上得到了比较全面的成果，有的已超过《代微积拾级》，某些成果近似近代的椭圆积分。
This paper discusses Xia's achievements on the integral problem about quadratic curve, some of which were similar to modern elliptic integral and surpassed the level of Dai-wei-ji.
头层皮鞋面配以中足支撑环提供出色的合脚性，无缝鞋头结构合脚且透气性好，经久耐穿，夏不积汗。
The first layer of leather surface accompanied by adequate supporting ring in providing excellent fit, seamless toe structure, fit and ventilation is good, durable wear, summer is not the plot Khan.
应用推荐