First, I take a beaker of water and heat it gently over a Bunsen burner.

首先，取一烧杯的水，在本生灯上微微加热。

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I tried this for a trip recently and it was quite fun to do, if a bit fiddly, much like an old chemistry class at school, minus the Bunsen burner.

在最近的一次旅行中，我尝试了一下，非常有趣，不过需要手巧一点，很像以前在学校里上的化学课，只是没有实验用的本生灯(Bunsen burner)。

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Bunsen burner invented by German chemist Robert Bunsen.

德国化学家罗伯特·本生发明本生灯。

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Any junior-high school kid can do that with a Bunsen burner.

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