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单词 ortho-hydrogen
释义 ortho-hydrogen
\|ȯ(r)thə+\ noun
: molecular hydrogen in which the two hydrogen nuclei are spinning in the same direction — compare para-hydrogen
 < ordinary hydrogen gas comprises an equilibrium mixture of three parts of ortho-hydrogen (with parallel nuclear spin) to one part of para-hydrogen (with antiparallel nuclear spin) — Otto Reinmuth >
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