Boron

(noun.) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.

约瑟夫编辑

• We tried silicon and boron, and a lot of things that I have forgotten now. 鲁伯特·萨金特·荷兰. 历史性发明.
• Discovery of Potassium, Sodium and Boron by Davy. Edward W. Byrn. 十九世纪发明进展.
• He now turned to the use of almost infusible metals--such as boron, ruthenium, chromium, etc. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• A great variety of methods for coating incandescent lamp filaments with silicon, titanium, chromium, osmium, boron, etc. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.

布伦达编辑