recurrence: 52 phrases in 18 subjects |
Astronomy | 3 |
Communications | 7 |
Earth sciences | 1 |
Electronics | 3 |
General | 1 |
Health care | 4 |
High energy physics | 2 |
Information technology | 1 |
Law | 1 |
Life sciences | 4 |
Mathematics | 3 |
Remote sensing | 1 |
Scientific | 2 |
Social science | 3 |
Statistics | 2 |
Technology | 6 |
Transport | 1 |
Радиоактивное излучение | 7 |