 |
|
| |||
| 对…来说是必需的必不可少的 | |||
|
essential for : 15 phrases in 9 subjects |
| Aviation | 1 |
| Business | 5 |
| China | 1 |
| Economics | 1 |
| Genetics | 2 |
| Management | 1 |
| Name of organization | 1 |
| Nautical | 2 |
| United Nations | 1 |
|
|
| |||
| 对…来说是必需的必不可少的 | |||
|
essential for : 15 phrases in 9 subjects |
| Aviation | 1 |
| Business | 5 |
| China | 1 |
| Economics | 1 |
| Genetics | 2 |
| Management | 1 |
| Name of organization | 1 |
| Nautical | 2 |
| United Nations | 1 |