Flood's equation
[机] 弗勒德方程式
🧩 词语组成解析
🗣️ 情景例句
She's off today.
她今天休假。
Of evil grain,no good seed can come.
坏谷无好种。
It took years of hard work to speak good English.
讲一口流利的英语需要多年的刻苦操练。