big=大，day=天，那big day是个啥意思呢？

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【今日精学】

What a wonderful spot! You should have seen it in its heyday.

You don't know it yet, but this Saturday is going to be a red-letter day in her life.

So, when's the big day?

—We haven't set it yet.

【语音精讲】

【精讲部分】

⭐1⭐

heyday

/ˈheɪˌdeɪ/

全盛时期

巅峰时期

【解释】

The heyday of sb/sth is the time when they are most powerful, successful, or popular.

【例句】

The man had his heyday in his eighties.

那位男士八十多岁的时候到达了人生巅峰。

What a wonderful spot! You should have seen it in its heyday.

这里真不错！你该看看这儿最辉煌的时期。

In its heyday, the studio's boast was that it had more stars than there are in heaven.

该制片厂吹嘘，它在鼎盛时期拥有的明星比天上的星星还多。

⭐2⭐

a red-letter day

值得纪念的一天

重要的一天

【解释】

A red-letter day is a day when something very important or exciting happens.

【例句】

Today is a red-letter day in our history.

今天是我历史上值得纪念的一天。

You don't know it yet, but this Saturday is going to be a red-letter day in her life.

你可能不知道，但这周六会是她人生中的大日子。

⭐3⭐

a/the big day

大喜日子

重要的日子

【解释】

1.a very important or significant day:

2.a person's wedding day:

【例句】

So, when's the big day?

—We haven't set it yet.

大喜日子定了吗（啥时候办喜酒呀）？

— 我们还没定呢。

It was a big day for country music.

那对于乡村音乐来说是一个重要的日子。

Wedding shops serve happy couples as they prepare for their big day.

婚庆店服务着幸福的新人，他们在为自己的大喜日子做准备。