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| major element; principal component | |||
| host element; principal element | |||
| pivot element | |||
| pivot | |||
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主元素 : 21 phrases in 10 subjects |
| Agriculture | 3 |
| Animal husbandry | 1 |
| Aviation | 1 |
| Desert science | 1 |
| Earth sciences | 3 |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Technology | 7 |
| Watchmaking | 1 |
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