One is that he observed when people were machining cannon barrels, a lot of heat was generated, and there was a lot of work done.

第一种说法说焦耳发现,制作加农炮筒时，会产生大量的热，同时这中间有大量的做功。

麻省理工公开课 - 热力学与动力学课程节选

Well, this is ridiculous because people were making cannons long before 1840.

当然了，这个故事毫无道理,因为人们制作加农炮还是1840年以前的事情了。

麻省理工公开课 - 热力学与动力学课程节选

And, so, you've got all these cannons that you just saw before, and you've got--they still have their uniforms and they build these huge barricades.

他们有你们之前所见的加农炮,还有就是,他们依旧身着制服,另外还造了很多街垒

耶鲁公开课 - 1871年后的法国课程节选