That puts puns in contrast to, say, a riddle about how many psychiatrists it takes to screw in a light bulb.

这就把双关比作一个问“装上一个灯泡需要多少精神病医生”的谜语。

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Rather than mopping up shares in Cathay, Air China should now be turning the screw in a rebounding domestic market.

与其买入国泰股份，国航现在应该在反弹中的国内市场加大竞争力度。

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We had to put a screw in. When you see the scan it looks like a little hole in the bone.

我们不得不放了一个螺丝在里面，当你看到扫描的图片时，你会觉得就像骨头上有一个洞。

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SRC back One is called SRC for Source and one is called SRC.back which was my backup of today's source code in case I screw up.

其中一个叫SRC，用来装源代码，另一个叫,用来备份源代码，以防我搞砸了。

哈佛公开课 - 计算机科学课程节选

How many teamsters does it take to screw in a lightbulb?

FORBES: Side Lines

They provide decent light at significant energy savings and because they last longer will also save millions in labor costs as it takes fewer people to screw in fewer lightbulbs.

FORBES: Congress Kills Light Bulb Ban - Sort Of

The Tablet of London, a well-known English Catholic publication, recently published a series of jokes about various groups within the Catholic Church, and here's how the one on Opus Dei goes: How many members of Opus Dei does it take to screw in a lightbulb?

NPR: A Glimpse Inside a Catholic 'Force': Opus Dei