Rectofistula
直肠瘘
🗣️ 情景例句
What classes are mandatory for your major?
你的专业什么课是必修的？
It's not four o'clock.
还没到四点呢。
The characters on the paper were white, and the rest of the paper was black.
纸上的汉字呈白色，其余部分成黑色。