 |
| |||
| positive externality | |||
| external benefit; external economy | |||
| |||
| positive externalities | |||
|
externalites positives : 1 短语, 1 学科 |
| 经济 | 1 |
|
| |||
| positive externality | |||
| external benefit; external economy | |||
| |||
| positive externalities | |||
|
externalites positives : 1 短语, 1 学科 |
| 经济 | 1 |