Reciprocant
微分不变式
🗣️ 情景例句
for the one seat on the Riverdale School Board,
争夺Riverdale联合校董会一个席次
This alone made our nine-day trip worthwhile.
光这件事我们九天的旅行就非常值得。
Time for our lunch, said Bruce. Then he looked around. Oh dear! I don't understand!
“午饭时间到了，”布鲁斯说。然后他看看四周。“天啊！我弄不明白了！”