a device that opens and closes to control the flow of liquids or gases, or a similar structure in the heart and the veins that controls the flow of blood阀;活门;(心脏或血管的)瓣膜
part of a musical instrument such as a trumpet that changes the sound by controlling the flow of air(喇叭等乐器的)阀键,活塞
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net
切換為繁體中文