...a pack of cards.是什么意思？

...a pack of cards.

一副纸牌

pack

n. 一群，包裹，（纸牌的）一副，一组；vt.& vi. （把…）打包，塞进，拥进，（使）聚集成团；vt. 挑选，压紧，携带，拧紧；vi. 包装，紧挤在一起，便于折叠收藏的，匆忙离去（有时与 off 连用）；

例句
Police arrived at his hotel and ordered him to pack his bags.
警察来到他的酒店，命令他收拾行李走人。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

cards

n. 卡（ card的名词复数 ），纸牌，贺卡，信用卡；

例句
The smart ones will have already bagged their seats by placing cards on them.
聪明人早已在座位上放一张卡片占住了位子。