in speed的用法和樣例：
例句
- We told those boy playing in our yard to vamoose.
我們叫那些在我們家後院子里玩的男孩趕快走開(kāi)。 - Step on it, the plane leaves in half an hour.
趕快，飛機再等半小時(shí)就要起飛。 - There was a rapid increase in internal trade.
國內貿易迅速增長(cháng)。 - She finished typewriting the letter at speed.
她迅速打好那封信。
