1·So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be?
那么，我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么，负一价的氟离子就是与它等电子的，我们还有氧-,氧应该是几价的？
2·A halogen element, f, is major raw materials deriving fluorine compound, and because of low melting point, that is widely used in steelmaking, nonferrous metal smelting, cement, glass and ceramics.
萤石中含有卤族元素氟，是制取含氟化合物的主要原料，又由于熔点低而广泛用于炼钢、有色金属冶炼、水泥、玻璃、陶瓷。
3·Control on harmful elements such as K, Na, f, s in smelting is short of effective measures, which results in BF capacity factor low, BF process not smoothly and serious environment pollution.
对冶炼中有害元素钾、钠、氟、硫的控制还缺乏有效手段，致使出现高炉利用系数偏低、高炉不畅和造成环境的严重污染。
4·And the unloadings from the factories cause great detriment of superposed F pollution.
工厂排污导致的叠加氟污染危害较大，应引起重视。
5·Results Along with different experiments the dissolutions of F and Al presented respective characteristics.
结果茶中氟和铝随冲泡次数、温度、时间、茶水比的不同呈现各自的溶出特性；
1·A mathematical model finds that a temperature of about 98.6 F is high enough to ward off the majority of fungal infections, but still low enough to only require a manageable level of food intake.
一种数学模型发现98.6华氏度的体温，对抵御绝大多数微生物的感染，已经足够了； 而对于将食物吸收维持在一个可控水平上，也足够低。
2·NASA just announced five science experiments that will fly on the scorching probe, which will be protected by a carbon-fiber heat shield that can withstand temperatures of 2, 500 degrees f.
NASA已经宣布将在这个“超级火热”的航空器中进行5项科学实验。航空器将得到表面的碳纤维材料层的保护，这个保护层能够忍受华氏2500度的高温。
3·It can heat up the surrounding air to 55, 000f - five times hotter than the surface of the Sun.
它可以把周围的空气加热到55000华氏度，热度比太阳的表面还要高5倍。
4·NASA just announced five science experiments that will fly on the scorching probe, which will be protected by a carbon-fiber heat shield that can withstand temperatures of 2,500 degrees F.
NASA已经宣布将在这个"超级火热"的航空器中进行5项科学实验。 航空器将得到表面的碳纤维材料层的保护,这个保护层能够忍受华氏2500度的高温。
5·The marathon was run on a very humid, 90f degree day.
马拉松比赛当天湿度很大，气温高达90华氏度。