chief
/tʃi:f; tʃif/ n
1 leader or ruler, esp of a tribe or clan 领袖; 统治者; （尤指）酋长, 族长.
2 person with the highest rank in an organization, a department, etc （组织、 部门等的）最高级别的人, 首长, 领导人, 主任
a chief of police 警长. chief, adj
1 [esp attrib 尤作定语]
most important; main; principal 最重要的; 主要的; 首要的
the chief rivers of India 印度主要的河流
The chief thing to remember is... 要记住的最重要的事是...
Smoking is one of the chief causes of lung cancer. 吸烟是导致肺癌的主要成因之一.
2 [attrib 作定语]
having the highest rank or authority 最高级别的; 最高权威的
the chief priest 祭司长. chiefly adv
(a) above all; principally 首先; 首要地
The Government is chiefly concerned with controlling inflation. 政府的当务之急是控制通货膨胀.
(b) mostly; mainly 大部分; 主要地
Air consists chiefly of nitrogen. 空气主要由氮气组成.