| |||
time of descent | |||
time of fall; drop-out time | |||
falling time | |||
decay time | |||
fall time | |||
down slope time | |||
| |||
fall time | |||
| |||
fall time | |||
| |||
fall time |
下降时间: 22 phrases in 12 subjects |
Air defense | 1 |
Automobiles | 1 |
Aviation | 1 |
Drilling | 2 |
Electronics | 4 |
Geology | 1 |
Hydroelectric power stations | 2 |
Nuclear physics | 1 |
Oil / petroleum | 1 |
Space | 2 |
Technology | 5 |
Telecommunications | 1 |