| |||
pilot study | |||
initial studies; preliminary investigation | |||
preliminary scrutiny | |||
preliminary study |
初步研究 : 19 phrases in 10 subjects |
Aviation | 1 |
Business | 2 |
Commerce | 3 |
Consulting | 5 |
Engineering geology | 1 |
International trade | 1 |
Oil / petroleum | 1 |
Shipbuilding | 1 |
Space | 2 |
Technology | 2 |