a part inside the body like a bag, which is filled with liquid, especially around a joint so that it can work smoothly 囊;黏液囊 Word Originearly 19th cent.: from medieval Latin, ‘bag, purse’, from Greek bursa ‘leather’.
👨🏻🏫 Mr. Ng 牛津詞典 📚 – oxford.mister5️⃣.net
切換為繁體中文