Ject对"二次" 的正确翻译：adratic quadrate；quadratic；quadrate；quadric；quadric secondary。例句参考：<em>二次</em>方程式论处理二次方程式的代数学的分支 - The branch of algebra that deals with quadratic equations.；他认为第<em>二次</em>世界大战是人类历史上最惨重的大屠杀。 - He thinks that the Second World War was the worst blood bath in human history.；