exist invt. 存在于
exist as以…形式(或形态)存在,作为…而存在,
4.For example, the Rio Grande pueblos already existed when the United States acquired sovereignty over New Mexico in 1848.
例如,当美国在1848年获得新墨西哥的主权时,大草原就已经存在了。
5.The worst of all is the implication that at some point there existed something halfway between a chimp and a human.
最糟糕的是,这暗示着在某一时刻,在黑猩猩和人类之间存在着某种东西。