Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，維持生命的行星就要在離恒星很近的軌道上運行，而且要有極好的條件才能使生命得以發展，
新概念英語第三冊
Lesson 55 From the earth Greetings
?? 句中詞匯解析
從本句中提取的重要詞匯
n. [天]行星;[占星]（左右人命運的）星相;
?? plano-, plan-, -plany, -plania 表”被動的漂流,閑逛”
"the planet Earth"
地球這顆行星
近義：planetary
adj. 緊密的;親密的;親近的;
vt. 關;結束;使靠近;
vi. 關;結束;關閉;
adv. 緊密地;
n. 結束;
?? clud(shut)→關閉；結束；接近的；親近的；準確的
"a close ally and friend of the prime minister"
首相的一個親密盟友和伙伴
近義：lock, seal, shut, quadrate, tally, solemnize
反義：unclose, unlatch, unlock, unseal, unfold, induct
orbit
['?rb?t]
詞頻3
詞根: orb
n. 軌道;勢力范圍;眼眶;（人生的）旅程，生活過程;
vt.& vi. 在…軌道上運行，環繞軌道運行;
vi. 盤旋;繞軌道運行;
vt. 繞軌道而行;進入軌道;
?? orb圓圈+it表名詞→軌道
"the earth's orbit around the sun"
地球環繞太陽的軌道
近義：loop, circle, cycle
反義：pass, range, span, traverse, bridge, course
vt.& vi. 提供，供給，供應;
vt. 規定;提供(+for);裝備;預備;
vi. 撫養，贍養(+for);做準備;預約(for 或 against);
?? pro提前+vid看+e→提前看好→預備；提供
"We flatter ourselves that we provide the best service in town."
我們相信我們提供的服務在本市最好.
近義：minister, procure, provision, purvey, stock, supply
adj. 完美的;正確的;優秀的;極好的;
n. [語]完成時;
?? per全部+fect做→全部做完→完美的；完全的
"Everyone liked my father—he was the perfect gentleman."
大家都喜歡我父親—他是真正的君子。
近義：improve, purify, refine, upgrade, better, meliorate
反義：incomplete, bad, sketchy, unaccomplished, uncompleted, unfinished