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.
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