Valvula
n. 瓣, 瓣膜\\n[医] 瓣, 瓣膜
🗣️ 情景例句
I can't make sense of it.
这个我弄不明白。
To play with his son
和儿子玩耍
But the competition of man against man is not the simple process envisioned in biology.
但是，人与人的竞争并不像生物学中想像的那样是一个简单过程。