Calculuses
微積分, 微積分學, 計算, 演算, 結石, 積石, 牙垢
??? 情景例句
Why do prices always go up during Spring Festival?
為什么春節期間很多東西都會漲價？
Mr. Green, Mr. Smith is here.
格林先生，史密斯先生在這里。
We stopped in Moscow on the way, but only for an hour or two, so there was no time to go into the centre of the city.
我們在莫斯科停了一下，但只停了一兩個小時，所以沒有時間去市中心玩。