Integal equation
[机] 积分方程式
🧩 词语组成解析
🗣️ 情景例句
More than 50% of marriages are doomed to fall.
50%的婚姻都注定以失败告终。
Old wood is best to burn, old horse to ride.
老柴好烧，老马好骑。
How it came about that snakes manufactured poison is a mystery.
蛇是怎样产生毒液的，这是一个谜。