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spot | |||
arbitrary | |||
offer-optional | |||
optional | |||
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arbitrary |
任选 的 : 31 phrases in 14 subjects |
Archery | 2 |
Automobiles | 3 |
Business | 1 |
Commerce | 2 |
Economy | 4 |
Finances | 1 |
General | 4 |
Geophysics | 1 |
Project management | 3 |
Shipbuilding | 1 |
Technology | 3 |
Telecommunications | 3 |
Textile industry | 1 |
United Nations | 2 |