 |
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| part per billion (X10⁻⁹); parts per billion (X10⁻⁹) | |||
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| part per billion (X10⁻⁹); parts per billion (X10⁻⁹) | |||
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| part per billion | |||
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| parts per billion (几) | |||
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| part per billion; part per milliard | |||
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| parts per billion | |||
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| parts per billion | |||
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| parts per billion | |||
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| parts per billion | |||
| 十亿分之: 19 phrases in 15 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Architecture | 1 |
| Automobiles | 1 |
| Business | 1 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 1 |
| General | 2 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Technology | 3 |
| Telecommunications | 1 |
| Water resources | 1 |