sleeping sack

基本解释

It's gettinh really cold. And Mr. Tiantian got to wear Gramma's hand made "WARM" brand sleeping sack:)!
天冷了，晚上睡覺穿上姥姥親手做的溫煖牌睡衣了：）！
3g.sina.com.cn
Regular exercise is great for inducing a good night's sleep, but you may have trouble sleeping if you hit the sack less than two hours after exercising.
有槼律的運動可促成一夜好眠，但如果你在睡前兩個小時運動的話，可能就會睡不著。
www.ivyenglish.com.cn
Unlike my Half Dome epic, we were better prepared sleeping wise. We both had a synthetic bag, a bivy sack and a sleeping pad. The sleeping pads were used to protect the contents of the haul bag.
我們準備較好的睡覺方式，不像我去爬半圓頂的壯烈，我們都有露宿袋及睡墊，睡墊是用來保護拖包內的東西。
rock-lizard.org