perimeter
音标：
英音/ pəˈrɪmɪtə(r) / 美音/ pəˈrɪmɪtər /
听听基本释意：
外刊例句：
White tents have been erected at the perimeter as rescuers in bright yellow hard hats work to free an estimated 81 people still trapped beneath the collapsed skyscraper.
随着亮黄色硬帽子的救援人员工作，估计有81人仍被困在倒塌的摩天大楼下方，释放了估计有81人。
—BBC
Firefighters worked throughout Tuesday night in Catalonia to define the perimeter of both the Torrefeta and Florejacs fires, according to the region’s fire service.
根据该地区的消防部门的说法，消防员在周二晚上在加泰罗尼亚工作，以定义Torrefeta和Florejacs大火的外围。
—BBC
Earlier at Isleworth Crown Court, Judge Hannah Duncan said the defendants had not breached the perimeter fence and they caused no disruption or “actual harm” but added they had shown “no remorse”.
汉娜·邓肯（Hannah Duncan）法官早些时候在Isleworth皇冠法院（Isleworth Crown Court）说，被告没有违反外围栅栏，也没有造成干扰或“实际伤害”，但补充说，他们表现出“不re悔”。
—BBC
基本释意：
none
none
外缘，周边；周长；（篮球）外围；视野计
同义词：
没有找到同义词
短释义：
From Latin peri meaning “around” and metron meaning “measure,” a perimeter is basically a boundary of any kind, measuring around the shape. In mathematics, perimeter refers to the length of this boundary. In geometry class, you might be asked to calculate the perimeter of a polygon, which is the sum of the length of each side. You might also hear this word used by members of the military or a police force as in “secure the perimeter” or “the perimeter has been breached.” A basketball player that likes to shoot from the three point line is said to “operate on the perimeter.”
名词周长是指封闭空间的边界。房屋的外围是其财产线。对于一个国家来说，这将是这个国家的边界。
长释义：
From Latin peri meaning “around” and metron meaning “measure,” a perimeter is basically a boundary of any kind, measuring around the shape. In mathematics, perimeter refers to the length of this boundary. In geometry class, you might be asked to calculate the perimeter of a polygon, which is the sum of the length of each side. You might also hear this word used by members of the military or a police force as in “secure the perimeter” or “the perimeter has been breached.” A basketball player that likes to shoot from the three point line is said to “operate on the perimeter.”
从拉丁语peri的意义“周围”和中子的意思是“度量”，周长基本上是任何形式的边界，围绕形状进行测量。在数学中，外围是指该边界的长度。在几何类中，可能会要求您计算多边形的周长，这是每一侧的长度之和。您可能还会听到军方成员或警察部队使用的这个词，例如“固定外围”或“周围被违反”。据说一个喜欢从三分线射击的篮球运动员“在外围行动”。
文学例句：
He stops to brush around a dark spot with his finger, chiseling around its perimeter until a rock comes loose.
他用手指停下来刷一个黑点，凿子在其周长周围，直到一块岩石松开。
—The Last Cuentista by Donna Barba Higuera
I walk the cafeteria perimeter to my table from last year, in the corner near the trash and recycling bins.
从去年，我将自助餐厅的周边漫步到我的桌子上，在垃圾和回收垃圾箱附近的拐角处。
—Muffled by Jennifer Gennari
It might have been cozy, if not for the animal traps set up in a perimeter around the place, jagged-toothed things trailing chains.
它可能很舒适，即使不是因为在该地方周围的周长中设置的动物陷阱，锯齿状的东西拖延了链子。
—The City Beautiful by Aden Polydoros
词源：
perimeter(n.)early 15c., perimetre, “circumference, outer boundary, or border of a figure or surface,” from Latin perimetros, from Greek perimetron “circumference,” from peri “around, about” (see peri-) + metron “measure” (from PIE root *me- (2) “to measure”). Military sense of “boundary of a defended position” is attested by 1943. Related: Perimetric; perimetrical.also from early 15c.
下面是词源的翻译（机器翻译比较难翻，参考着看）
周长（n。）15c。，外围，“图或表面的圆周，外边界或边界”，来自拉丁语围裙，来自希腊偏僻的围绕“圆周”，从周围围绕“周围”（请参阅peri-ter-m metron + metron + metron“ sucal *me-（pie Me-（pie Me-（pie）root *me-（2））， 1943年，与“捍卫立场的边界”的军事意识得到了证明。相关：围绕；外围。也从15c初开始。
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