Chondrostei
软骨硬鳞鱼类
🗣️ 情景例句
It has been a learning experience. That's true.
这真是一次学习经验， 真的。
Her job is beginning to get her down.
她开始对工作感到厌倦了。
What was the population of the world in 1950?
1950年世界人口是多少？