un
der
ground
复数形式
undergrounds
1
地铁, 地下铁路
a city's railway system that is below the ground, usually in big cities
- The underground system in London is one of the oldest and most extensive in the world.
伦敦的地铁是世界上最古老和最广泛的地铁之一。
- Commuters rely on the underground to navigate the bustling city quickly and efficiently.
通勤者依靠地铁快速高效地穿梭于繁华的城市。
- During rush hour, the underground trains can be quite crowded, making it difficult to find a seat.
在高峰时段，地铁可能会非常拥挤，很难找到座位。
- She purchased a monthly pass for the underground to save money on her daily commute.
她购买了一张地铁月票以节省日常通勤费用。
- The city has made significant investments in upgrading the underground infrastructure to improve safety and service.
该市已投入大量资金升级地下基础设施，以提高安全性和服务。
2
地下组织, 抵抗
a group or organization that operates secretly to resist or overthrow a government or authority
- The underground played a crucial role in organizing protests against the oppressive regime.
地下组织在组织反对压迫政权的抗议活动中发挥了关键作用。
- During the war, the underground provided intelligence and support to the resistance fighters.
战争期间，地下组织为抵抗战士提供了情报和支持。
- Members of the underground risked their lives to distribute anti-government pamphlets.
地下组织的成员冒着生命危险分发反政府传单。
- The underground was instrumental in helping political prisoners escape to safety.
地下组织在帮助政治犯逃到安全地带方面发挥了重要作用。
- The government launched an extensive operation to dismantle the underground and its networks.
政府发起了一项广泛的行动，以拆除地下组织及其网络。
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