oyster

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

He had two dozen oysters and enjoyed every one of them. 他吃了兩打牡蠣，每一個都吃得津津有味。

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. 某人可以隨心所欲

You're young, you've got a lot of opportunity. The world is your oyster. 你年輕，又得到了很多機會。你可以隨心所欲地施展自己。