Directional derivative
[计] 方向导数
🧩 词语组成解析
directional
[[di'rekʃənəl]]
a. 方向的
derivative
[di'rivətiv]
n. [数]导数，微商;[化] 衍生物，派生物;[语]派生词;
adj. 衍生的;导出的;拷贝的;
🗣️ 情景例句
Or did you forget to give it to me?
或许是你忘了给我吧？
In all things, it is better to hope than to despair.
凡事抱希望为佳，不应悲观而失望。
We visited the Great Wall. We went there by bus. We all took some food and drink with us.
我们参观了长城。我们是坐车去的。我们每人都自备一些食物和饮料。