Sideroferrite
木化石中发现的天然铁
🗣️ 情景例句
Nothing to worry about.
没有什么好担心的。
It says a storm may come next month.
天气预报说下个月会有一场暴风雨。
Even if a piped water supply is safe at its source,
既使管道供水系统在水源处是安全的，