投药 : 68 phrases in 12 subjects |
Agriculture | 1 |
Air defense | 1 |
Animal husbandry | 2 |
Business | 1 |
Ecology | 3 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 6 |
General | 5 |
Otorhinolaryngology | 2 |
Reproductive biology | 3 |
Technology | 30 |
Water resources | 13 |