complain(v)抱怨;申述 complain about / of
complaint(n)抱怨
complement(n)补充物
complete(adj)完全的;(v)完成
complex(adj)复杂的;合成的
complicate(v)使…复杂/难懂
complicated(adj)麻烦的;难解的
complication(n)复杂
compliment(n)问候
comply(v)按照;服从 comply with