1
the perimeter of [noun]
表示物理边界。
The perimeter of the property is marked by a fence.
该物业的周界由栅栏标出。
周界；周边；边缘
先理解核心含义，再看它在真实句子里的用法。
周界；周边；边缘
the boundary line or the area immediately inside the boundary
The perimeter of the property is marked by a fence.
该物业的周界由栅栏标出。
物体各边长度之和。
The sum of the distance of all the lengths of the sides of an object.
边界线或边界内的区域
the boundary line or the area immediately inside the boundary
这种边界的长度。
The length of such a boundary.
围绕平面区域的线
a line enclosing a plane areas
We walked around the perimeter of the lake before having lunch.
我们绕着湖的周边走了一圈，然后吃了午饭。
A low hedge defines the perimeter of the garden.
一道矮树篱标出了花园的周界。
The fence follows the perimeter of the property.
栅栏沿着地产的周界修建。
表示物理边界。
The perimeter of the property is marked by a fence.
该物业的周界由栅栏标出。
表示在边界内部区域。
All vehicles must remain within the perimeter of the base.
所有车辆必须停留在基地周界内。
军事或安保常用搭配。
The soldiers were ordered to secure the perimeter.
士兵们奉命封锁周界。
Not this
我们需要perimeter这个区域。
Use this
我们需要划定这个区域的周长。
perimeter是名词，意为'周长'，不能用作动词。中文学习者容易误将英语名词当动词使用。
Not this
这个圆的perimeter是20厘米。
Use this
这个圆的circumference是20厘米。
描述圆形边界的专业术语是circumference（圆周），perimeter通常用于多边形或其他封闭图形。这是词汇选择上的常见混淆。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
防御周界
The troops established a defensive perimeter around the base.
部队在基地周围建立了防御周界。
周界围栏
The intruder climbed over the perimeter fence.
入侵者爬过了周界围栏。
周界安全
They tightened perimeter security after the threat.
他们在受到威胁后加强了周界安全。
围墙
The ancient city had a high perimeter wall.
古城有一道高围墙。
周界巡逻
Guard dogs are used for perimeter patrol.
警犬用于周界巡逻。
场地边缘
The ball went out of the perimeter of the field.
球出了场地边缘。
建立布防范围
The soldiers established a perimeter around the camp.
士兵们在营地周围建立了布防范围。
确保外围安全
Security guards secured the perimeter before the event started.
保安在活动开始前确保了周边安全。
巡逻周边
The police patrolled the perimeter of the building all night.
警察整夜在大楼周边巡逻。
他们正在穿过边界！
In the movie 'Jurassic Park', a security guard yells this when dinosaurs breach the fence.
在电影《侏罗纪公园》中，一名保安在恐龙冲破围栏时喊道。
我们需要确保周边安全。
A common line in military and action movies, such as 'The Matrix', where characters plan to defend an area.
军事和动作电影中常见台词，例如《黑客帝国》中角色计划防守一个区域时所说。
Use perimeter naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：'peri'像'周围'，'meter'是'米尺'，合起来就是测量周围的长度。
语域：neutral 常见场景：geometry、security、sports 通常用于数学几何、安防或体育等正式或技术性语境，日常生活中较少单独使用
These words share the spelling ending '-meter' and a similar stress pattern on the second syllable. However, note that 'perimeter' has /-mətər/ (with schwa) while most of these have /-mɪtər/ or /-mɑːmɪtər/, so they are not perfect rhymes.
Dictionary facts from ECDICT, WIKTIONARY.