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
She was sick so the didn't attend her classes.
她生病了，所以没上学。
Do you have change for a twenty-dollar bill?
你付了一张20美元帐单了吗？
He told me that the firm could not afford to pay such large salaries.
他还告诉我，公司支付不起这么庞大的工资开支，