Difference equation
[计] 差分方程
🧩 词语组成解析
🗣️ 情景例句
No, but I've read enough about it.
不曾，不过我常常读到有关它的报导。
I can't remember what John was doing yesterday afternoon.
我不能记得约翰昨天下午正在做的东西。
They play it like this, six students stand in a row in front of the class.
6个学生在全班前面站成一排。