Ferruginosity
含铁性
🗣️ 情景例句
Hot dogs. I love hot dogs.
热狗。我喜欢热狗。
Opportunity seldom knocks twice.
机不可失，失不再来。
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。