Quadratic sum
[计] 平方和
🧩 词语组成解析
a. 二次的\\nn. 二次方程式
sum
[sʌm]
n. 总数;算术;金额;概略，要点;
vt.& vi. 总计;总结，概括;归纳;
🗣️ 情景例句
And without their energy and stamina,
没有他们的体力和耐力，
John and I are old friends.
我和约翰是老朋友了。
Look at the snow! It's quite light.
瞧这雪！这么小。