Mesonephridium
中胚肾
🗣️ 情景例句
I promise I won't leave early.
我发誓我再也不会早走了。
When I came in, he was reading.
当我进来的时候，他在读书。
He will take part in an important race across the Atlantic.
他将参加一次重大的横渡大西洋的比赛。