off the mark

中英例句：

1. Be quick off the mark if you hear of something promising.
   若聽說有前途的事情要馬上行動。
2. Local firms have been quick off the mark to cash in on the oil boom.
   地方商行不失時機地利用油價暴漲大賺其錢。
3. You have to be quick off the mark when you answer a newspaper advertisement.
   回應報紙的廣告得說辦就辦。