臀部（俚语）
先理解核心含义，再看它在真实句子里的用法。
臀部（俚语）
the fleshy part of the human body that you sit on; buttocks
He fell off his bike and landed right on his buns.
他从自行车上摔下来，屁股直接着地。
用法提示：这里buns是俚语，指臀部，作名词用。
After sitting on the hard bench for hours, my buns were sore.
在硬板凳上坐了几个小时后，我的屁股很疼。
用法提示：buns指臀部，描述因久坐引起的不适。
The toddler waddled around in his diaper, showing off his little buns.
那个蹒跚学步的孩子穿着纸尿裤走来走去，露出他的小屁股。
用法提示：buns在此处是俚语，指幼儿的臀部，语气轻松幽默。
常用于称赞或追求身材。
He works out every day to have nice buns.
他每天都在锻炼，为了拥有好看的臀部。
俚语，表示‘别坐着不动’。
You've been sitting all day; get off your buns and take a walk.
你坐了一整天了，起来走走。
俚语，意为‘赶快’。
Move your buns or we'll be late!
快点，不然我们要迟到了！
grammar · medium
易错句子I ate two bun for breakfast.
正确表达I ate two buns for breakfast.
buns 是可数名词复数形式，表示多个小圆面包时必须加 -s，单数 bun 不能表示复数。
grammar · medium
易错句子I slipped and hurt my bun.
正确表达I slipped and hurt my buns.
在俚语中表示臀部时，通常使用复数形式 buns，单数 bun 不表示这个意思。
grammar · medium
易错句子I need to buy buns for sandwiches.
正确表达I need to buy bread for sandwiches.
buns 特指小圆面包，而三明治通常使用切片面包（bread），除非特别指定用圆形面包做三明治，否则使用 bread 更恰当。
butt也指烟蒂，而buns专指臀部。
bread是不可数名词，泛指面包；buns是可数名词，指圆形小面包。
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