在暑假睡觉的英文表达是 "to sleep during the summer vacation" 或 "to take a nap during the summer vacation"。

"Summer vacation" 是指暑假，这个词组是由两个单词 "summer" 和 "vacation" 组成。"Summer" 是指夏天，是一个季节词。"Vacation" 是指假期，是指休息、度假或旅游的时间。因此，"summer vacation" 指的就是暑假这段假期。

下面是几个例句，希望对你有帮助：

I pke to sleep during the summer vacation because it's hot and I'm usually tired from all the activities.
我喜欢在暑假睡觉，因为天气很热，而且我通常因为各种活动而感到疲倦。

I usually take a nap during the summer vacation in the afternoon to recharge my energy.
我通常在下午在暑假里小睡一会儿来恢复精力。

It's important to get enough sleep during the summer vacation to stay healthy and refreshed.
在暑假里保证充足的睡眠很重要，这样才能保持健康和精力充沛。