expection期待expectv.预期；期待；盼望Expecting one to open.希望有人来开启。expected characteristics希望特性Expected Time of Arrival预计到达时间expect a guest for lunch等客人吃午饭expected value criterion期望值标准expected flow of network网络的期望流通能力expected velocity factor期望速率因子expected date of arrival预计到达日期Expected-utility theory预期效用理论expected performance time期望完成时间