候鸟 (hòu niǎo) — migratory bird

定義

例文

• 每年秋天，很多候鸟会飞到南方过冬。
  Měi nián qiū tiān, hěn duō hòu niǎo huì fēi dào nán fāng guò dōng.
  Every autumn, many migratory birds fly south for the winter.
• 这片湿地是许多候鸟的栖息地。
  Zhè piàn shī dì shì xǔ duō hòu niǎo de qī xī dì.
  This wetland is a habitat for many migratory birds.
• 保护候鸟对生态环境很重要。
  Bǎo hù hòu niǎo duì shēng tài huán jìng hěn zhòng yào.
  Protecting migratory birds is very important to the ecological environment.