1.
N-UNCOUNT
氟 Fluorine is a pale yellow, poisonous gas. It is used in the production of uranium and other chemicals.
- Noun
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1. a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
- synonym: F,atomic number 9
医学
- 1.氟:一种非金属的气体元素,属卤族;符号为F;原子序数9;原子量18.998。氟化物中的氟进入骨和牙的结构中,并可防龋;氟过多可致斑釉


