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part per billion (ppb) | |||
parts per billion (ppb, 10⁻⁹,指美、法) | |||
billionth (10⁻⁹); part per billion (10 ~9) | |||
billi- | |||
parts per billion | |||
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nano- | |||
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parts per billion | |||
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parts of billion (ppb) | |||
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billionth | |||
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billionth | |||
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parts per billion |
十亿分之一 : 4 phrases in 4 subjects |
Air defense | 1 |
Architecture | 1 |
Business | 1 |
General | 1 |