Fuo
不明原因发热（Fever of Undetermined Origin）
🗣️ 情景例句
No, thanks.
不用了， 谢谢。
It's already in production, so you can expect it in stores before the end of the month.
产品已投产了，所以月底前你可以获得。
Beyond two or three days, the world's best weather forecasts are speculative,
世界上最好的两三天以上的天气预报具有很强的猜测性，