a couple of hours

基本解释

If you know your partner loves to read on Saturday afternoons for a couple of hours, try not to schedule anything during that time.
如果你知道你的配偶习惯于在周六的下午进行几个小时的阅读，那就不要在这段时间安排任何事情。
After a nice snowstorm, he can easily make $100 in profit just by handling the houses near him – it takes him a couple of hours and he really enjoys it.
一场大雪过后，他仅仅通过清理他房屋周围的积雪就能轻松赚到100美元，这项工作只花费他几个小时，而且他非常喜欢。
She went on: “I spend a couple of hours each Sunday morning, relaxing by this lake and helping these little guys out.
她继续道：“每个周日的早上，我花几个小时得时间在这里放松，并且帮助这些小家伙。

Anders Wilhelmson says the sanitation process can take as little as a couple of hours or as long as two to four weeks.
A couple of hours, because typically there's just one battle; one side beats the other and that's the war for now.
几个小时,一般来说只有一次战斗,一方攻打另一方,这就是战争
耶鲁公开课 - 古希腊历史简介课程节选
But I think if you can imagine, up to a couple of hours would be about right.
但是如果你想一下的话,最多几个小时吧
耶鲁公开课 - 古希腊历史简介课程节选

So both people came into the office and spent a couple of hours with us.
FORBES: Want to Get a Promotion? Be Funny