翻譯是：You must have enough sleep, at least eight hours a day.
句子解釋：
enough 英[?n?f] 美[?n?f]
adv. 足夠地，充足地; 十分地;
adj. 足夠的; 充足的;
n. 充分，足夠; 滿足;
[例句]They had enough cash for a one-way ticket
他們有足夠的錢買單程票。
sleep 英[sli:p] 美[slip]
vi. 睡，睡覺;
vi. 睡，睡覺; 睡眠狀態;
vt. 為…提供床位; 提供住宿; 以睡覺打發日子;
[例句]They were exhausted from lack of sleep
由於缺乏睡眠，他們非常疲憊。
at least 英[?t li:st] 美[?t list]
adv. 至少;
[詞典] 無論如何，反正;
[例句]He's been away for at least a week.
他走了總有壹個星期吧。