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unobserved; unaccounted-for | |||
not detectable; not detected | |||
undetected | |||
unknown | |||
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undiscovered |
未 发现的: 16 phrases in 8 subjects |
Animal husbandry | 1 |
Business | 1 |
Economy | 4 |
Electronics | 2 |
General | 3 |
Hydroelectric power stations | 1 |
Oil / petroleum | 2 |
Technology | 2 |