要塞 (yào sài) — fortress, fort; strategic stronghold

Definition

Examples

• 这座要塞建于明朝，非常坚固。
  Zhè zuò yào sài jiàn yú míng cháo, fēi cháng jiān gù.
  This fortress was built in the Ming dynasty and is very sturdy.
• 军队在要塞里进行防御训练。
  Jūn duì zài yào sài lǐ jìn xíng fáng yù xùn liàn.
  The army conducts defense training inside the fort.
• 他们守卫着边疆的重要要塞。
  Tā men shǒu wèi zhe biān jiāng de zhòng yào yào sài.
  They guard the important strategic stronghold on the frontier.