| |||
cavern | |||
taouerta (复数: tiyourten, 撒哈拉) | |||
stone cavern |
石洞 : 46 phrases in 12 subjects |
Bridge construction | 4 |
Earth sciences | 1 |
Ecology | 1 |
Electronics | 2 |
Engineering geology | 7 |
Exhibitions | 2 |
General | 2 |
Hydroelectric power stations | 2 |
Mountaineering | 1 |
Oil / petroleum | 2 |
Space | 1 |
Technology | 21 |