Difference equation
[计] 差分方程
🧩 词语组成解析
🗣️ 情景例句
We need a man who knows the ropes.
我们需要位内行人士。
We want to purchase Chinese tea. Please send us your best offer by fax indicating origin packing, quantity available and the earliest time of shipment.
我们欲购中国茶。请用电传给我们报最好价，并说明产地、包装、可供数量及最早发货日期。
Lemonade!
柠檬水！