And in others, kids can never study or even watch TV once Dad hits the sack.

也有些情形是只要老爸一睡觉，孩子们可能就无法读书或看电视。

Early. Took a yoga class and hit the sack.

他们觉得是怎么回事。

I'm so tired that I think I'll just hit the sack.

我好累，所以我想干脆去睡觉。

If you hit the sack or hit the hay you are officially going to bed for the night.

如果你“hit the sack/hay（睡觉）”代表你是正式要上床睡觉了。

It sounds like they are tried and ready to sleep. That's what hit the sack means; you are going to bed.

听起来他们很累，准备去睡觉。“hit the sack”的意思是：你要去睡觉了。

Oh, well. I guess I'll hit the sack.

哦, 好的. 我想去睡觉了。

It’s one o'clock – time to hit the sack.

【sack】现在是一点钟，该睡觉了。

Starting at least an hour before you hit the sack, cut back on how much exposure to bright light you're getting, Experts advise.

专家建议，至少从睡觉前1小时开始，降低暴露在强光下的时间。

I took your college course. I say it's time to hit the sack.

我听完课了 我们准备走吧。

Former British Prime Minister Margaret Thatcher famously claimed that she only hit the sack for five hours a night.

英国前首相玛格丽特·撒切尔 (Margaret Thatcher) 曾说过，她每晚只睡五个小时。