perimeter是什么意思 perimeter的用法 perimeter怎么读

perimeter

英 [pə'rɪmɪtə]美 [pə'rɪmɪtɚ]

n. 周长；周界；[眼科] 视野计

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星级词汇:★★

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记忆方法

1. peri- "周围、附近" => perimeter, perigee.

中文词源

perimeter 外缘，周长

peri-,在周围，-meter,测量，词源同meter,diameter.引申词义外缘，周长。

英语词源

perimeter (n.)

early 15c., "line around a figure or surface," from Latin perimetros

, from Greek perimetron "circumference," from peri- "around" (see peri-) + metron "measure" (see meter (n.2)). Military sense of "boundary of a defended position" is attested from 1943.

权威例句

1. By night, the perimeter wire was illumined by lights.

到了夜里，周遭的铁丝网都被灯光照亮。

2. The plane veered off the runway and careered through the perimeter fence.

飞机突然偏离跑道，高速冲过了周围的护栏。

3. Some 300 trees have been ranged along the perimeter hedge.

沿着绿篱栽种着大约300棵树。

4. Guards patrol the perimeter of the estate.

保安人员在庄园四周巡逻。

5. The river marks the eastern perimeter of our land.

这条河标示我们的土地东面的边界.

[ perimeter 造句 ]