Backward difference operator
[计] 后向差分算子
🧩 词语组成解析
🗣️ 情景例句
Yes. Have the people arrived?
是的。客人来了吗
Excuse me, but do you handle remittance checks here?
打扰了，你们办理汇款支票吗？
They are my only comfort. When you take those away from me, you also take my life.
它们是我唯一的安慰。你们没收了我的财物，也就是要了我的命。