A：英文中似乎有個「慣用語」可以表達這樣的意思，那就是 “within () of each other”，括弧中放的是「多少時間」以及「多少距離」的數量和單位。舉例來說會比較容易瞭解：Seventy-year-old twin brothers have been run over by lorries and killed while cycling in separate accidents within three hours of each other. (兩名 70 歲的孿生兄弟先後在騎單車時遭到卡車輾斃，兩起意外事故相距不到 3 小時)；Two young Palestinians fall victim to landmines within one hour of each other. (兩名巴勒斯坦青年相距不到一小時先後成為地雷的受害者 )；There are two bird’s nest specialty shops here. They are within 2.5 kilometers of each other. (這裡有兩家燕窩專賣店，兩者相距不到 2.5 公里)。
當然，括弧內也可以用其他計量單位，視你要表達的意思而定。