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be in doubt about (what, whether) |
未确定 : 49 phrases in 21 subjects |
Agriculture | 1 |
Animal husbandry | 1 |
Architecture | 1 |
Automobiles | 1 |
Aviation | 1 |
Business | 7 |
China | 2 |
Commerce | 4 |
Economy | 6 |
Finances | 1 |
Fishery fishing industry | 1 |
General | 5 |
Genetics | 2 |
Hydroelectric power stations | 1 |
International trade | 2 |
Management | 1 |
Project management | 2 |
Securities | 2 |
Space | 1 |
Technology | 5 |
Textile industry | 2 |