参考词典中atomic number 34的常规释义：
英英解释
- a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
[同]
atomic number 34, se, selenium
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