Kirchhoff and Bunsen were fascinated by how different elements glow different colors when you put them in a flame, like stick some table salt in there and you'll get a bright yellow flame.

基尔霍夫和本森着迷于不同的元素在火焰中如何发出不同的颜色，就像在火里面放一些食盐，你会得到一个亮黄色的火焰。

Laura loved to look at the lamp, with its glass chimney so clean and sparkling, its yellow flame burning so steadily, and its bowl of clear kerosene colored red by the bits of flannel.

劳拉喜欢看那盏灯，它的玻璃灯罩如此干净、闪闪发光，它的黄色火焰如此稳定地燃烧，它的一碗透明煤油被法兰绒碎片染成了红色。