trophozooid

例句：

1. 1. The zookeeper was very excited to see the new baby elephants.
   动物园管理员看到新生大象时非常兴奋。
2. 2.He is a zoologist who studies animals in their natural habitats.
   他是研究动物在自然栖息地的生物学家。
3. 3.The keeper carefully fed the animals and ensured they were healthy.
   饲养员小心喂食动物，确保它们健康。