Backward difference
[计] 后向差分
🧩 词语组成解析
🗣️ 情景例句
The election's next month.
选举就在下个月。
We have 50 provinces.
我们有50个省。
The Crystal Palace was different from all other buildings in the world, for it was made of iron and glass.
这座水晶宫不同于世界上所有的其他建筑，因为它是用钢和玻璃建成的。