Please give me a dozen doughnuts.
字典例句：We need half a dozen eggs for the cake.
A few dozen protesters waved placards.
There were only half a dozen people at the party.
Nine people were killed and dozens were injured in street clashes.
I must have mentioned him dozens of times in my letters.
dozens在上面這兩句才是當名詞（複數），表示lots of（很多） ，是數以打計。後面可以跟著介系詞片語，當作修飾語。