environment all the plants of a particular place or from a particular time in history(某一地點或時期的)植物群
all the bacteria and other organisms that live inside an animal(生活在某一動物體内的)細菌和其他生物群
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net切换为简体中文