必要: requisite; necessary; certai ...的: 4次方是 The fourth power of 2 i ...周转: turnover时间: time; hour周转时间: turn round rate; turn round time; turn-round time; turnaround cycle; turning-round time; turnover time采购周转时间: purchase lead time车辆周转时间: car cycle船舶周转时间: turn round (around , or turnaround) time; turn round （around ， or turnaround） time货车周转时间: cycle of car movement; time of turnaround of freight cars; turnover time of freighttrain per week运转时间；周转期: turn-around time供应商周转时间: vendor lead time环流水周转时间: water turnover time流动资本周转时间: working capital turnover time装卸两港周转时间: ttbe trun time both ends必要的准备时间: the necessary preparation time旅客列车车底周转时间: turnround time of passenger train set必要的: be essential to; constitutive; imperative; integral; mandatory; nec necessary; nece aryto/for; necessary to /for; needful; obligato; requisite周转时期: turnover period船的周转期: vessels'turnaround time; vessels’turnaround time酶的周转数: turnover number of enzyme种的周转率: species turnover rate周转的周期: cycle of turnover; cycle turnover资金的周转: capital turnover必要的, 需要的: needful必要的，需要的: erforderlich
