词汇	酌量性费用
释义	酌量性费用 discretionary expenditure
随便看	branching of polymer chains branching operation branching order branching process in random environment branching process in random environments branching process method branching program branching programme branching programming branching random Q matrix branching random Q process branching random transition matrix branching random walk branching random walks branching rate branching ratio branching ration branching ratios branching reach branching reach with bend branching reaction branching renewal process branching repeater branching representation branching river