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Jyutping hei1 tou2 jyun4 sou3
Pinyin xī tǔ yuán sù

Definitions (CC-CEDICT)
  1. rare earth element (chemistry)
Definitions (Wiktionary)
  1. noun
    rare earth element
    (syn.) 稀土金屬, 稀土金属
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)