| underground disposal (The discharge, dumping or emission of wastes below the surface of the soil) |
地下处理 |
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| underground dump (Any subterranean or below-ground site in which solid, or other, waste is deposited without environmental controls) |
地下垃圾站 |
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| Underground Injection Control (program) |
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| underground quarry (Quarry located below the surface of the earth) |
地下采石场 |
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| underground railway (An electric passenger railway operated in underground tunnels) |
地下铁路 |
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| underground sources of drinking water |
地下饮用水源 |
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| underground storage (Storage located underground designed to hold gasoline or other petroleum products or chemical solutions) |
地下储存 |
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| underground train (A train for transportation of people, mostly beneath the surface of the ground, in order to lessen the traffic) |
地铁列车 |
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| underprivileged people (A segment of the population that does not have access to the rights or benefits granted to the rest of society, often because of low economic or social status) |
弱势群体 |
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| undertaking business (Any commercial activity, position or site associated with the preparation of the dead for burial and the management and arrangement of funerals) |
殡葬业 |
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| underwater outlet (Point of water disposal located below the sea surface) |
水下排水口 |
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| unemployment (The condition of being without remunerative employment) |
失业 |
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| ungulate (Hoofed mammals, including the Artiodactyla and Perissodactyla) |
蹄类动物 |
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| unhindered settling |
自由无影响沉积作用 |
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| unified system safety analysis |
统一系统安全分析 |
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| uninterrupted transpiration |
连续蒸腾 |
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| uninterrupted transpiration |
不间断蒸腾 |
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| unit leaf rate |
单位叶速度 |
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| unit leaf rate |
单位叶速度指叶生长 |
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| United Nations (A voluntary association of around 180 state signatory to the UN charter (1945), whose primary aim is to maintain international peace and security, solve economic, social, and political problems through international co-operation, and promote respect for human rights) |
联合国 |
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