 |
| bolha: 109 phrases in 18 subjects |
| Agriculture | 1 |
| Brazil | 2 |
| Chemistry | 6 |
| Construction | 1 |
| Earth sciences | 4 |
| Economy | 4 |
| Environment | 2 |
| General | 4 |
| Industry | 52 |
| Information technology | 5 |
| Materials science | 1 |
| Mechanic engineering | 1 |
| Medical | 2 |
| Metallurgy | 13 |
| Microsoft | 2 |
| Natural sciences | 1 |
| Technology | 2 |
| Transport | 6 |