return: vi.1.回转，回来，回去，返回，折回 ( to)。2.再来，又来；复发，回复，恢复。3.回头说正经话，回到本题，言归正传。4.送还，归还(原主)。5.回答，回嘴，回骂。 He has gone never to return. 他一去不回。 The property returned to the original owner. 财产已归还原主。 return to du
returned: adj.被送回的；已归来的；已回国的。 returned empties 退回的空箱[空桶(等)]；〔英谑〕归国牧师。 a returned overseas Chinese 归国华侨。
constant: adj.1.恒定不变的，固定的，稳定的，恒久的；继续不断的。2.不屈不挠的，坚韧的。3.忠实的，有节操的。短语和例子be constant in love 忠贞不渝的爱情。 two days of constant rain 两天接连下雨。 constant to one's duty 忠于职守。 constant wind 恒风。n.【数、物】常数，恒量；恒定(值)；(常
Simple impulse control for equity index tracking problem with non - constant return rate 具有非常数回报率的证券指数跟踪问题的简单脉冲控制
3.
In the former a constant return to scale technology with labor as the sole input is used ; in the later an increasing return to scale technology based on the division of labor that needs both labor and capital as input is used . we can show that in a closed economy or in the situation of complete international specialization the increase of productivity in traditional sector leads to the expansion of modern sector 因此，经济发展可以看作劳动分工网络不断扩展与深化的过程，而对分工网络的性质和它与各种经济要素之间关系的了解，则是对发展中国家在国际经济体系中的地位及其国际经济政策的有效性做出正确判断的前提。
