A dozen在此句中的解釋不是”一打”吧?

Rice balls with folded plastic wrappers separating the rice from the seaweed; a dozen kinds of cold tea in a dozen different bottles―enter any convenience store in Japan, and you’re immediately struck by the great variety and quality of the packaging! 這小段中出現兩次a dozen 我想確定a... 顯示更多 Rice balls with folded plastic wrappers separating the rice from the seaweed; a dozen kinds of cold tea in a dozen different bottles―enter any convenience store in Japan, and you’re immediately struck by the great variety and quality of the packaging!
這小段中出現兩次a dozen
我想確定a dozen在文中的解釋
總覺得若用"一打"解釋怪怪的

除此之外
可否列句說明呢?

再麻煩大家了
感謝
更新: 還有句中struck也不知作何解釋?麻煩都幫我詳細回答喔 謝謝
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