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outguard | |||
outpost | |||
advanced post | |||
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picket; piquet | |||
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outpost | |||
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outpost | |||
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outpost | |||
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advance post |
前哨 : 24 phrases in 10 subjects |
Air defense | 3 |
Animal husbandry | 3 |
Chess | 3 |
Genetics | 1 |
Life sciences | 1 |
Military | 3 |
Plastic surgery | 1 |
Surgery | 2 |
Technology | 5 |
United Nations | 2 |