 |
| |||
| 方程组 | |||
| 方程系 | |||
| |||
| 方程组 | |||
| system of equations: 58 phrases in 12 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Bridge construction | 2 |
| Business | 21 |
| Corporate governance | 1 |
| Economy | 1 |
| Hydroelectric power stations | 2 |
| Mathematics | 4 |
| Mining | 1 |
| Rail transport | 1 |
| Technology | 22 |
| United Nations | 1 |