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| 兆加仑 | |||
| 百万加仑 | |||
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million gallons per day : 18 phrases in 7 subjects |
| Business | 1 |
| Earth sciences | 3 |
| Economy | 2 |
| General | 2 |
| Mining | 3 |
| Oil / petroleum | 5 |
| Technology | 2 |
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