three-course
| rotation
| three-course | |
| gen. | 三区 的 |
| rotation | |
| archer. | 轮换 |
| forestr. | 轮伐; 倒茬 |
| forestr. од. | 轮作 |
| hydroel.st. од. | 转动 |
| math. | 旋转，转作 |
| math. од. | 旋度 |
| met. | 旋光 |
| tech. од. | 旋转 |
| |||
| 三区轮作的 | |||
|
three-course : 6 phrases in 5 subjects |
| Agriculture | 2 |
| Dietology | 1 |
| Soil science | 1 |
| Technology | 1 |
| Textile industry | 1 |