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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
Be careful! Don't throw your cigarette out of the window. If you do that, you may start a fire. Put it out in the ashtray.
当心!别把香烟丢到窗外。要是你那样做,会引起火灾的。把它熄灭在烟缸里。
Those first words were to change my world.
我最先学会的这些单词改变了我的生活天地。
Yes, but one thing is most unlikely to change.
对,但有一件事是最不可能改变的。
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