He heated the flask over a Bunsen burner.

他在本生灯上加热烧瓶。

She heated the solution in the flask over a Bunsen burner.

她用本生灯加热烧瓶中的溶液。

I need to light my Bunsen burner.

我得把本生灯点起来.

Ten sample bars suspended vertically were ignited by a Bunsen burner.

十个样品酒吧垂直暂停被本生灯点燃了.

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。

You will hear Miss Wang give instructions on how to use a Bunsen burner.

你将听到王小姐给出如何正确使用煤气灯的说明.