expedite <> retard

expedition <> foot dragging expend <> store up

expire <> come to life

explicit <> obscure

extant <>    destroyed

extant <> extinct/lost

extant <> missing

extemporaneous <> planned extinct <> resuscitated

extinction <> perpetuation extinguish <> kindle

extinguish <> rekindle

extol <> censure

extol <> disparage

豪爽的  <> 羞怯的

加速  <> 妨碍

迅速  <> 脚步拖沓

花费  <> 储藏

断气  <> 重生

清晰的  <> 模糊的

现存的  <> 被毁的

现存的  <> 灭绝的/丧失的

现存的  <> 丢失的

即席的  <> 有计划的

灭绝的  <> 复活的

灭绝  <> 永存

熄灭  <> 点燃

熄灭  <> 重新点燃

赞美  <> 责难