a sack of sth
表示“一袋……”，of 后接不可数名词或复数名词，如 a sack of coal、a sack of rice。
He bought a sack of potatoes at the market.
他在市场上买了一袋土豆。
一袋之量；（旧时的）计量单位；擒杀（四分卫）；（棒球）垒包；洗劫；劫掠；掠夺物；战利品
a bag, especially a large strong one or a paper/plastic shopping bag
袋子；尤指用结实粗糙材料制成的大袋,用于储存和搬运土豆、煤炭、咖啡等商品；也指超市有提手的购物袋、食品袋；或装小物件的小袋。
A bag; especially a large bag of strong, coarse material for storage and handling of various commodities, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket, a grocery sack; or, a small bag for small items, a satchel.
纸质或塑料购物袋
a bag made of paper or plastic for holding customer's purchases
一袋之量；也指容量因物品种类和地方习惯而异的古老或历史计量单位；旧时英国重量单位(通常用于羊毛),等于13英石(182磅),或有资料称26英石(364磅)。
The amount a sack holds; also, an archaic or historical measure of varying capacity, depending on commodity type and according to local usage; an old English measure of weight, usually of wool, equal to 13 stone (182 pounds), or in other sources, 26 stone (364 pounds).
封闭空间
an enclosed space
洗劫被攻占的城镇或城市。
The plunder and pillaging of a captured town or city.
一袋之量
the quantity contained in a sack
掠夺所得的赃物或战利品。
Loot or booty obtained by pillage.
在争球线后成功擒抱四分卫。
A successful tackle of the quarterback behind the line of scrimmage.
一垒、二垒或三垒处固定的方形垒包。
One of the square bases anchored at first base, second base, or third base.
任意一次性袋子。
Any disposable bag.
The cashier put my groceries into a paper sack.
收银员把我的杂货放进一个纸袋里。
用法提示：这里'sack'作为名词，指纸袋，用于装购物品。
He carried his lunch in a brown sack.
他用一个棕色袋子装着午餐。
用法提示：这里'sack'作为名词，指袋子，用于携带食物。
She bought a sack of potatoes at the market.
她在市场买了一袋土豆。
用法提示：这里'sack'作为名词，表示一袋的量，用于计量。
表示“一袋……”，of 后接不可数名词或复数名词，如 a sack of coal、a sack of rice。
He bought a sack of potatoes at the market.
他在市场上买了一袋土豆。
复数形式表示数量多于一袋，常与可数名词复数连用。
They loaded sacks of grain onto the truck.
他们把一袋袋谷物装上卡车。
用 in sacks 表示以袋装的形式出售或运输。
The cement is sold in sacks.
这种水泥是袋装的。
into a sack 强调把物品装入袋中的动作方向。
She packed the apples into a sack.
她把苹果装进一个袋子里。
sack 常指较结实粗大的袋子（如麻袋、厚纸袋），bag 更通用，可指大小、材质各异的袋子；日常大多可替换，但若强调粗麻大袋，用 sack 更贴切。
grammar · medium
易错句子He bought a sack rice from the market.
正确表达He bought a sack of rice from the market.
汉语说“一袋米”，中间不加任何连接词；但英语里 sack 表示“一袋”这个量时，必须使用“a sack of + 名词”结构，of 不能省略。
grammar · medium
易错句子The workers carried three sack of coal upstairs.
正确表达The workers carried three sacks of coal upstairs.
sack 是可数名词，被数词 three 修饰时要用复数形式 sacks；汉语名词本身不随数词变形，学习者容易漏掉词尾 -s，注意“数字 + 复数名词 + of + 名词”的搭配。
一袋土豆
He bought a sack of potatoes at the market.
他在市场买了一袋土豆。
食品杂货袋
She put the bread and milk into a grocery sack.
她把面包和牛奶放进食品杂货袋。
套袋赛跑
Children enjoy the sack race at the fair.
孩子们喜欢集市上的套袋赛跑。
对城市的洗劫
The sack of the city lasted three days.
对这座城市的洗劫持续了三天。
四分卫擒杀（美式橄榄球）
He made a key quarterback sack in the final minutes.
他在最后几分钟完成了一次关键的四分卫擒杀。
土豆等农产品常用麻袋盛装和运输。
煤通常装在大袋中搬运和储存。
面粉常用纸袋或布袋包装出售。
谷物经常存放在大麻袋里。
超市购物时，食品杂货常装在纸质或塑料的袋子里。
上床睡觉；去睡觉
I'm exhausted, so I'm going to hit the sack early tonight.
我累坏了，所以今晚要早点上床睡觉。
被解雇；被炒鱿鱼
He got the sack for always coming in late.
他因为总是迟到而被解雇了。
无用之辈；倒霉鬼
Poor Charlie is a real sad sack; nothing ever goes right for him.
可怜的查理真是个倒霉鬼，什么事都不顺。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.