Reciprocant
微分不變式
??? 情景例句
for the one seat on the Riverdale School Board,
爭奪Riverdale聯合校董會一個席次
Christmas Day we have a large dinner with many different things to eat.
在圣誕節晚餐，我們會吃很多不同的佳肴。
So far so good.
到目前為止，一切都好。