见机行事

• Your conduct would be quite as dependant on chance as that of any man i know ; and if , as you were mounting your horse , a friend were to say , " bingley , you had better stay till next week , " you would probably do it , you would probably not go - and , at another word , might stay a month .
  我知道你也跟一般人一样，都是见机行事。譬如你正跨上马要走了，忽然有朋友跟你说：彬格莱，你最好还是待到下个星期再走吧。那你可能就会听他的话，可能就不走了，要是他再跟你说句什么的，你也许就会再待上一个月。 ”