为包的每个递降层级重复执行这一模式。
Repeat this pattern for each successively lower level of Packages.
化学的递降分解作用十分缓慢，以致它在食物链的连续各阶段中变得更为浓缩。
Chemical degradation is very slow so that it becomes more concentrated in successive stages of the food chain.
本文用逐步递降法的思想证明了不存在边长和中线都是整数的直角三角形和等腰三角形。
In this paper it is proved that there exist neither right triangles nor isosceles triangles with integer sides and medians by the method of descending.
应用推荐