Many of the oyster bays around Britain have gone,destroyed mainly by pollution,and now far from being cheap,they are an expensive luxury.

• 英国周围的许多产牡蛎的海湾已不复存在，主要是被污染破坏了。今天，牡蛎不但不便宜，简直是一种昂贵的奢侈食品。