英语语法分析

Bunsen burner invented by German chemist Robert Bunsen.

德国化学家罗伯特·本生发明本生灯。

Then with a Bunsen burner the surface is thoroughly seared.

然后，用本生灯彻底烧灼表面。

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。