Backward differentition method（）：n. - 完整释义与助记

🧩 词语组成解析

backward ['bækwɚd]

adj. 向后的;反向的;怯生生的;落后的; adv. 向后地;相反地;回溯地;

back后边+ward向... →向后的

method ['mɛθəd]

n. 方法;条理;

meth(meta-=after)+od(way)→方法；体系；秩序（=a way after,a following after）

Do have some more, there's plenty left.

多吃一点，还有很多呢！

I'm a federal employee. I work for the Department of Labor.

我是一个联邦雇员。我为劳动部门工作。

The spheres had been magnetized and attracted or repelled each other all the time.

金属球经过磁化，互相之间不停地相互吸引或相互排斥。

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