prevail
vi.流(盛)行;获胜，占优势;劝说，诱使
I admired the creativity which prevailed among the young writers.我钦佩青年作家的那种创造力。
previous
a.先，前，以前的;(to)在…之前
I’ve met him before on two previous occasions.我以前见过他两次。
prey
n.捕获物;受害者 v.捕食;折磨a tiger stalking its prey潜行跟踪猎物的老虎
reliable
a.可靠的，可信赖的
a birth control method that is cheap and reliable既便宜又可靠的避孕方法
reliance
n.依靠，依赖
the country’s heavy reliance on trade该国对贸易的严重依赖
