汉：英语前缀peri来源于希腊语,意为“around”
英：word-forming element meaning "around, about, enclosing," from Gk. peri (prep.) "around, about, beyond," cognate with Skt. pari "around, about, through," L. per (see per).
1.perigee
n.point in an orbit of a planet or spacecraft at which it is closest to the earth 近地点 ge(o)=earth
Once the satellite reaches perigee, it will eject a small probe which enter the planet's atmosphere.
当人造卫星达到近地点时，就会发射一根小探针，这根探针将进入行星的大气层.
2.perimeter
n. outer boundary of a closed figure, a military position. 周，周围，周边。meter=measure
Guard posts can be seen every 100 meters around the entire perimeter of the prion.
在监狱周边每隔100米就有一个警卫岗。
3.periscope
n. instrument with mirrors and lenses arranged to reflect a view down a tube,etc.潜望镜,scope=watch
The submarine captain spotted the destroyer through the periscopes.
潜水艇的艇长通过潜望镜掌握了驱逐舰的位置。
4.peristyle
n. row of columns surrounding a temple,court,etc.列柱廊，列柱中庭。styl=column
The cloister was surrounded by a peristyle reminiscent of the Parthenon.
修道院被一列柱廓所环绕，让人想起帕台农神殿