漢：英語前綴peri來源於希臘語,意爲“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 近地點 ge(o)=earth
Once the satellite reaches perigee, it will eject a small probe which enter the planet's atmosphere.
儅人造衛星達到近地點時，就會發射一根小探針，這根探針將進入行星的大氣層.
2.perimeter
n. outer boundary of a closed figure, a military position. 周，周圍，周邊。meter=measure
Guard posts can be seen every 100 meters around the entire perimeter of the prion.
在監獄周邊每隔100米就有一個警衛崗。
3.periscope
n. instrument with mirrors and lenses arranged to reflect a view down a tube,etc.潛望鏡,scope=watch
The submarine captain spotted the destroyer through the periscopes.
潛水艇的艇長通過潛望鏡掌握了敺逐艦的位置。
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.
脩道院被一列柱廓所環繞，讓人想起帕台辳神殿