We shall study a very particular kind of sequences, called convergent sequences.我们将研究称为收敛数列的很特别的一类数列.Generating functions are an ideal tool for studying sequences defined by recurrence.母函数是研究用递推关系来确定的函数的最理想工具.Heterochrom...
Car firms are desperate to achieve economies of scale.汽车厂商拼命想要实现规模经济。They admit they are now desperate for a lucky break.他们承认现在急盼幸运之神的降临。The company'sclosure has left many small businessmen in desperate financial st...