- empirical chemical formula
- 实验: experiment; test; trial run
- 实验化学: empirical chemistry; experimental chemistry
- 理论和实验化学: teoreticheskaya i eksperimentalnaya khimiya
- 理论化学与实验化学: theoretical & experimental chemistry
- 化学式: chemical formulae; chemical formulas; formula （pl. formulae）; sio2
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