n (1)軌道(path in which sth moves around a planet，star，etc，eg the path of the Earth round the Sun or a spacecraft round the Earth)[C]：the moon's～round the earth 月球繞地球運行的軌道;the～of the earth 地球的軌道;The satellite was launched into～around the moon.那顆人造衛(wèi)星經(jīng)發(fā)射已進入月球軌道。〖同〗course，track，path，way，route;
(2)勢力范圍(area of influence or control)[C]：When children are out of the family～，they sometimes behave badly.孩子一旦脫離家庭的管教，有時就不規(guī)矩了。I guess our buddy is off in～again.我想我們的伙伴又出去活動了。Such matters are outside my～.這種事不歸我管。
v 環(huán)繞(某天體等的)軌道運行(move in orbit round(sth))[I，T+n]：The moon～s round the earth.月球環(huán)繞地球運行。How long does it take for the Earth to～the Sun?地球繞太陽轉(zhuǎn)一周需要多長時間?〖同〗circle;
→′orbital adj 軌道的;勢力范圍的