Opalina ranarum
[医] 蛙扁纤毛虫
🧩 词语组成解析
[医] 扁纤毛虫属
🗣️ 情景例句
What about a cup of tea?
喝杯茶如何？
Mountain-climbing is difficult.
登山是困难的事。
He can't write very much on a card, Mum.
在明信片上他写不了很多，妈妈。