firmament /ˈfɜːməmənt/

• 1. 

  N-SING The firmament is the sky or heaven. 苍穹; 天国 [文学性] ['the' N]

  例：

  There are no stars in the firmament.

  天空没有星星。

• 2. 

  N-SING If you talk about the firmament in a particular organization or field of activity, you mean the top of it. 上层 ['the' N, usu with supp]

  例：

  He was rich, and a rising star in the political firmament.

  他很有钱，更是高层政坛一颗冉冉升起的新星。