He changed the slide slaɪd幻灯片. The next picture was also taken at night, but this time without moonlight ˈmuːnlaɪt月光. It showed a small group of tents tɛnts帐篷;帐棚 in the foreground ˈfɔːɡraʊnd(景物、图画等的)前景, dimly ˈdɪmli模糊地;朦胧的 outlined ˈaʊtlaɪnd显示轮廓;勾勒外形 against the low horizon həˈraɪzn地平线,and beside them an untidy ʌnˈtaɪdi不整齐的;凌乱的 heap hiːp(凌乱的)一堆;许多;大量 of wooden boxes and a sledge sledʒ雪橇.
But the main interest of the picture lay in the sky. Streams striːmz流;(液)流;(气)流 and veils veɪlz面纱 of light hung hʌŋ悬挂;垂下;垂落 like curtains ˈkɜːtnz窗帘;帘;幔, looped luːpt使成环;成环形运动 and festooned feˈstuːnd给…饰以花彩 on invisible ɪnˈvɪzəbl看不见的;隐形的;无形的 hooks hʊks 曲线球 hundreds of miles high or blowing out ˈbləʊɪŋ aʊt吹出 sideways ˈsaɪdweɪz往(或向、从)一侧 in the stream of some unimaginable ˌʌnɪˈmædʒɪnəbl难以想象的 wind. “What is that?” said the voice of the Sub-Rector副校长. “It's a picture of the Aurora ɔː'rɔːrə极光.”“It's a very fine photogram,” said the Palmerian Professor prəˈfesə(r)教授. “One of the best I've seen.” 
“Forgive my ignorance ˈɪɡnərəns无知,” said the shaky ˈʃeɪki颤抖的 voice of the old Precentor prɪˈsɛntə教堂领唱牧师, “but if I ever knew what the Aurora was, I have forgotten. Is it what they call the Northern ˈnɔːðən北方的 Lights?” “Yes. It has many names. It's composed kəmˈpəʊzd由…组成(或构成)的 of storms of charged particles 带电粒子风暴 and solar rays ˈsəʊlə(r) ˈreɪz太阳光 of intense and extraordinary strength ɪkˈstrɔːdnri streŋθ非凡的力量—invisible in themselves,but causing this luminous ˈluːmɪnəs发光的;发亮的 radiation ˌreɪdiˈeɪʃn辐射;放射线 when they interact ˌɪntərˈækt交流;沟通;互动 with the atmosphere ˈætməsfɪə(r)大气，大气层，大气圈.If there'd been time,I would have had this slide tinted ˈtɪntɪd为…轻微染色;给…略微着色;染(发) to show you the colors;pale peɪl灰白的;苍白的 green and rose rəʊz粉红色的,for the most part,with a tinge tɪndʒ 微量，少许，一丝，几分 of crimson ˈkrɪmzn深红色；暗红色 along the lower edge of that curtain-like formation fɔːˈmeɪʃn组成物;形成物.
This is taken with ordinary emulsion ɪˈmʌlʃn乳浊液；(照相)乳胶. Now I'd like you to look at a picture taken with the special emulsion.” He took out the slide.Lyra heard the Master say quietly,“If he forces a vote,we could try to invoke ɪnˈvəʊk援引，援用(法律、规则等作为行动理由) the residence clausek ˈrezɪdəns klɔːz居住地条款.He hasn't been resident ˈrezɪdənt居民;住户 in the College for thirty weeks out of the last fifty-two.” “He's already got the Chaplain ˈtʃæplɪn牧师;专职教士 on his side...”the Librarian laɪˈbreəriən图书馆馆长;图书管理员 murmured ˈmɜːməd低语 in reply.
