Opalinid
[医]蛙片亚门原虫（的）
🗣️ 情景例句
Be on your guard.
你要提防着点儿。
Are these books all yours?
这些书全是你的吗？
has spent his lifetime studying active volcanoes and deep caves in all parts of the world.
花了毕生的精力来研究世界各地的活火山和探洞。