Central difference operator
[计] 中心差分算子
🧩 词语组成解析
🗣️ 情景例句
It's a bonsai tree for your new apartment.
这是一颗盆栽，祝贺你迁新居。
Treat it with respect.
请你放尊重点！
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。