Difference equation
[计] 差分方程
🧩 词语组成解析
🗣️ 情景例句
Alexandra.
Alexandra。
How long have you been studying English?
你学了多长时间的英语了？
When honey bees have discovered a feeding place, they fly directly to it from the hive.
当蜜蜂发现一个喂食点时，它们从蜂箱直接飞往那里。