天 灾 : 22 phrases in 16 subjects |
Agriculture | 2 |
Aviation | 1 |
Bridge construction | 1 |
Business | 1 |
Desert science | 1 |
Ecology | 1 |
Economy | 3 |
Environment | 1 |
Finances | 1 |
Forestry | 2 |
International trade | 1 |
Project management | 2 |
Securities | 1 |
Technology | 2 |
Textile industry | 1 |
Wind Energy | 1 |