❶primary; first;overarching; of the first importance ❷leader; chief 首脑会议的～主题 overarching theme of the summit/政府～government leaders/～分子ringleader;chief culprit/～任务number one task;most important task/～条件primary condition/～原因 （法律）first cause/～战犯arch criminal; chief war criminal /～云集a galaxy of leading figures