This offer is firm subject to your acceptance reaching us not later than December 15.
此报盘为实盘,但以我方在12月15日前收到你方答复为准。
At lunchtime, the tourist thanked him and gave him ten pounds, which was a lot of money in those days.
午餐时,这位游客向他表示感谢,并给了他10英镑。这在当时可算是一大笔钱了。