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standard substance
| selection
| standard substance | |
| oil | 标准物质 |
| space | 标准物; 基准物 |
| selection | |
| genet. | 选育 |
| hydroel.st. | 选择; 挑选 |
| space | 选择; 选定 |
| |||
| 标准物质 | |||
| 标准物; 基准物 | |||
| 标准物 (质) | |||
| standard substance: 12 phrases in 2 subjects |
| Chemistry | 1 |
| Technology | 11 |
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