Central difference notation
[计] 中心差分记法
🧩 词语组成解析
🗣️ 情景例句
Yes? Can I do something for you?
什么事？我能为您效劳吗？
He that soweth virtue shall reap fame.
播下美德，收获名望。
Recently, one of Jeremy's closest friends asked him to make a speech at a wedding reception.
最近，杰里米的一个最亲密的朋友请他在一个婚礼上祝词。