Once upon a time, many advertisements used puns to achieve good publicity.

曾经，很多广告会使用双关语来达到良好的宣传效果。

Stop punning and be serious.

别开玩笑了，严肃点。

This machine can pun materials to improve hardness.

这台机器可以捣碎材料来提高坚硬度。

He spoke of a hatchet job, which may be a pun on some senator's name.

他提到恶毒诽谤一词 这可能和某个参议员的名字一语双关

He is a master of the pun and the double entendre.

他是个说下流的双关语和俏皮话的大师。

He spoke of a hatchet job, which may be a pun on some senator's name.

他提到“恶毒诽谤”一词，这可能和某个参议员的名字一语双关。

We're banking on them lending us the money—no pun intended!

我们正指望他们借给我们钱呢—bank绝无双关之意！

 He is a master of the pun and the double entendre.

他是个说下流的俏皮话和双关语的大师。

So presumably this, too, is a pun.

因此据我揣测这也是一个双关语。