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准确地写出化学反应的化学式。
He can never write chemical formulas correctly for chemical reactions.
youdao
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化学上H 2 O是正确的化学式，而2zz就不是。
In chemistry H2O is a syntactically correct formula, but 2zz is not.
youdao
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化学上H 2 O是正确的化学式，而2zz就不是。
In chemistry H2O is a syntactically correct formula, but 2zz is not.
youdao