Seattle arr dept : please arrive before 12 : 00n , return must be after 4 : 00pm . vancouver arr dept : you can arrive anytime , return must be after 2 : 00pm 西雅图进温哥华出：请安排飞机抵达在12 : 00n之前，回程则必须在2 : 00pm之后起飞。
It can fully utilize space height through upper platform supported by bottom rack * arr - angement of second rack on the platform . it ' s a very typical application of utilizing height during manual picking rack 通过底层货架支撑上层平台，并且在平台上排布第二层货架，可以充分利用空间高度，是人工拣选货架中利用高度的典型应用。
Basic technique of decision - making of investment is pb rule , arr rule , npv rule , irr rule and pi rule . and npv rule is viewed as a better method . there are two parameters needing to be decided in npv formula , one is project ' s cash flows , the other is project ' s cost of capital . estimating cash flows should obey the basic principle : with / without principle 在净现值公式中，有两个重要的变量需要确定，一是项目现金流量，一是项目资本成本。估计项目现金流量是应遵循的最基本原则是相关不相关原则，以此来识别项目的相关现金流和非相关现金流，重点要考虑的是机会成本和销售额侵蚀成本。
