| |||
second moment; second-order moment | |||
secondary moment |
二 阶矩 : 18 phrases in 10 subjects |
Artificial intelligence | 1 |
Business | 2 |
Chemistry | 1 |
Construction | 1 |
Earth sciences | 4 |
Hydroelectric power stations | 2 |
Rail transport | 1 |
Space | 2 |
Sports | 1 |
Technology | 3 |