everlasting
adj.永恒的，持久的
extant
adj.现存的(existing)
extemporaneous
adj.即席的(impromptu)
He was gifted at making extemporaneous lectures.
他有做即席演讲的天赋。
formerly
adv.从前，原来(previously)
former
adj.以前的(ago,previous)
I still keep in touch with my former boss.
我仍然和以前的老板保持联系。
forthright
adj.(古)立即的
The brave soldiers marched forthright with a knowledge that there would not be any enemy ahead.
勇敢的士兵们知道前方不会有敌人后立刻行动起来。
hasty
adj.匆忙的(rushed)
immediate
adj.立即的(instant)
impromptu
adj.临时的;即兴的(extempore)
The pianist gave an impromptu performance at the party.
那位钢琴家在晚会上即兴表演了一场。
improvise
vt.即席而作(extemporize)
The actors improvised a scene based on an audience suggestion.
演员们根据观众的建议即兴创作了一个场景。
instantaneous
adj.瞬间的，即刻的(ephemeral)
interlude
n.间隔(interval);插曲(episode)
juncture
n.时刻
lasting
adj.持久的( enduring,long-term,continuing)
lately
adv.最近
nocturnal
adj.夜间的(nighttime,nightly)
An owl is an nocturnal bird, while a sparrow is diunal.
猫头鹰是夜间活动的鸟，而麻雀白天活动。
obsolete
adj.过时的(disused,outmoded)
The decoration in this room was somewhat obsolete.
这个房间的装饰有些过时了。
occasional
adj.临时的
They supplied tourists with occasional chairs.
他们给游客提供了临时的椅子。
overdue
adj.逾期的(tardy,late)