oyster

1. N-COUNT An oyster is a large flat shellfish. Some oysters can be eaten and others produce valuable objects called pearls. 牡蛎

He had two dozen oysters and enjoyed every one of them. 他吃了两打牡蛎，每一个都吃得津津有味。

2. PHRASE If you say that the world is someone's oyster, you mean that they can do anything or go anywhere that they want to. 某人可以随心所欲

You're young, you've got a lot of opportunity. The world is your oyster. 你年轻，又得到了很多机会。你可以随心所欲地施展自己。