citadel

名词

1. 1

   城堡、要塞、堡垒

   The ancient citadel still overlooks the harbor from the hilltop.

   那座古老的要塞至今仍从山顶俯视著港口。

2. 2

   大本营、坚强堡垒比喻

   The university was long seen as a citadel of free thought.

   这所大学长期被视为自由思想的大本营。