a leading cadre; a senior officer; a chief

• 首长

a leading cadre; a senior officer; a chief的用法和样例：

例句

1. My chief tells me to respond for the United States Navy.
   我的首长让我代表美国海军致答辞。
2. The confederacy had no official head or chief executive officer.
   联盟没有一长制首长，即没有主掌执行权的首脑。