- 1鎢（化學符號 W）。舊式燈泡裡的那條發光細絲就是鎢絲，台灣直接講「鎢絲燈泡」；工具鋼裡的「碳化鎢」也是它。
Tungsten is a metal — one of the basic materials the world is made of, so it has a symbol on the chemistry chart: W. What makes it special is that it is very hard, very heavy, and it takes an enormous amount of heat to melt it — more than any other metal. That last part is why you meet it in light bulbs. The old kind of bulb, the round glass one that gets hot, has a tiny thread of wire inside; electricity makes that wire so hot that it glows and gives light. Almost any other metal would simply melt and break. Tungsten does not, so tungsten is what the wire is made of. It is also mixed into steel to make the steel harder — cutting tools, drill bits, things that have to bite into other metal. And because it is heavy for its size, you now see it in rings and watches, sold as a metal that will not scratch. The word is a normal noun; you say 'tungsten' with no 'a' and no plural, the way you say 'water' or 'gold'. In science books you may also see the name 'wolfram' for the same metal, which is where the letter W comes from — the W does not come from the word tungsten at all.
組成From Swedish: tung 'heavy' + sten 'stone' — 'heavy stone'. Swedish miners gave that name to a heavy rock they dug up, and the name later stuck to the metal itself.
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
tungstennoun/ˈtʌŋstən/
- 1
A rare metallic chemical element (symbol W, from Latin wolframium) with an atomic number of 74.
- He then explained that tungsten has the highest melting point, and the highest boiling point, of all known elements.
- So far they have built and used a prototype robot to make millionth-of-a-meter scratches in aluminum with a fine tungsten needle.
- 2
Any of various commercially available alloys principally of tungsten.
- There was a bar of tungsten on the bench, and they were invited to feel how heavy it was.
- 3
A light bulb containing tungsten.
- We have several business houses where tungstens are used as window lights only, and find that in nearly every one the wiring was arranged to get more light, leaving the consumption about the same.
- Lighting was unimaginative for the standard stock with naked tungsten filament bulbs and metal reflectors. However, all compartments had individual reading lights above the seats with attractive glass shades.
- 4
obsoletechemistrygeographygeologyscheelite, calcium tungstate
- We apprehend that this is not the acid of a calx ponderoſa, but rather a diſtinct acid conjoined to common calcareous earth, ſince, in fact, in another place, § 97, the tungſten is mentioned as a calx ſaturated with a peculiar acid, perhaps of a metallic nature, for which the author himſelf refers us to the above § 33, and ſeems to think it the ſame as the acid there mentioned.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。