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Terms for subject Earth sciences containing parts per trillion | all forms | exact matches only | in specified order only
| English | Chinese |
| parts per trillion | 英，德百亿亿分之一 |
| parts per trillion | 美，法万亿分之一 |
| parts per trillion by volume | 英，德百亿亿分体积比 |
| parts per trillion by volume | 美，法万亿分体积比 |