| |||
| 双方向的 | |||
|
two- directional : 19 phrases in 8 subjects |
| Automobiles | 1 |
| Bridge construction | 1 |
| Business | 2 |
| Chemistry | 2 |
| Electronics | 1 |
| Metallurgy | 4 |
| Space | 1 |
| Technology | 7 |
| |||
| 双方向的 | |||
|
two- directional : 19 phrases in 8 subjects |
| Automobiles | 1 |
| Bridge construction | 1 |
| Business | 2 |
| Chemistry | 2 |
| Electronics | 1 |
| Metallurgy | 4 |
| Space | 1 |
| Technology | 7 |