external clock
| select
| external clock | |
| space | 外部时钟 |
| select | |
| gen. | 选; 挑选; 挑; 挑选出来的; 精选的 |
| manag. | 选择 ，挑选 |
| oil | 选择 |
| space | 选定 |
| space од. | 选取 |
| tech. | 选择 |
| |||
| 外部时钟 | |||
|
external clock : 10 phrases in 4 subjects |
| Air defense | 1 |
| Electronics | 7 |
| Oil / petroleum | 1 |
| Technology | 1 |