| 释义 |
polar cap短语¹³¹⁶²⁰⁺³
基本例句
n.天行星两极处之极冠;地南北极的冰帽
At night the electron density is very low when the station situates at the polar cap area.
夜间进入极差区后，电子密度则很低。 geophy
The orbital characteristic of interplanetary probes has a direct bearing on the aim of probing. To explore the polar cap of the object body requires polar orbit or the high inclination orbit.
星际探测器轨道的特征与探测目的密切相关，对目标天体两极地区进行探测显然采用的是极轨道或接近极轨道。 cnki |