牡蛎卡（Oyster Card）是一种射频识别（RFID）的智能卡，用于伦敦市内公共交通服务中的电子检票，特别是公车与地铁。
The Oyster card is an RFID smart card used for electronic ticketing on London public transport services, notably the London Underground and buses.
在尖峰时间，市内的公车和电车都拥挤不堪。
During rush hour, it is standing room only on the city's buses and trains.
从星期五开始，我们将为所有身穿和服的人提供免费的地铁和公车车票，以及市内20个景点的门票，此次活动将持续11天。
We will offer free tickets for subways, buses and 20 sites in the city for 11 days from Friday to anyone wearing a kimono.
应用推荐