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Jyutping san4 ging1 sing3 duk6 zai1
Pinyin shén jīng xìng dú jì

Definitions (CC-CEDICT)
  1. nerve agent
  2. nerve gas
Definitions (Wiktionary)
  1. noun
    nerve gas; nerve agent
    (syn.) 神经毒气, 神經毒氣