11 expectation n.预期,期望,指望
12 expedition n.远征(队),探险(队)
13 expel v.把…开除驱逐排出发射
14 expend v.消费,花费
15 expenditure n.花费(时间,金钱等的)支出,消耗
16 expense n.花费,消费,消耗
17 expensive a.花费的,昂贵的
18 experience n./vt.经验经历体验阅历
19 experiment n.实验试验 v.(on)进行实验做试验
20 experimental a.实验(性)的,试验(性)的