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Perimeter
[ pə'rɪmɪtɚ ]
其它 Other
n. <数>周长;周围,边界;
💡 词根助记
peri周围,靠近+meter测量→测量一圈→周边
📝 例句
Drinks in hands, they wandered around the perimeter of the ball field.
他们手里拿着饮料在球场周围漫不经心地遛跶。
The barbed wire fence round the perimeter discouraged intruders.
周围有铁丝网阻止了外人闯入.
Guards had been posted at several points around the perimeter.
在环形防线上已布置了几处岗哨.
The circle has greater area than a regular polygon of the same perimeter.
正的面积比同样周长的正多边形的面积大。
How am I to find the perimeter in the dark?
我在黑暗里怎么看出周围的警戒线呢?
🌱 联想助记
【记】※ peri-前缀“周围”,meter-米:圆周边的米数即周长
※ per-每一,i-似“蜡烛”,meter-米:每一根蜡烛的周长有一米
📖 牛津释义
perimeter
n
1 (length of the) outer edge of a closed geometric shape 周; 周边; 边缘; 周长.
2 boundary of an area 周围的界限
Guards patrolled the perimeter of the airfield. 卫兵沿机场四周巡逻.
[attrib 作定语]
the perimeter fence 周围的篱笆. Cf 参看 circumference.
🔁 扩展释义
*[pә'rimitә]n. 周长, 周界, 边缘【医】 周, 周边, 周界线; 周长; 视野计
🌿 同词根单词
period
n. 时期;(一段)时间;学时;句号;
adj. 具有某个时代特征的;(关于)过去某一特定历史时期的;(家具、服饰、建筑等)某一时代的;
🗣️ 情景例句
I'll have a ham salad, please.
请给我一份火腿沙拉。
One day she came into my room laughing happily.
有一天,她开心地笑着来到我的房间。
There were birds too, with the eyes carved out of the rock and painted white.
还有一些鸟的眼睛是用石头刻的,并被涂上白色。
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