| 41. | Whether a planet can support life depends on the size and brightness of its star , that is its 'sun'. |
| 一颗行星是否能够维持生命取决于它的恒星——即它的“太阳”——的大小和亮度。
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| 42. | Imagine a star up t twenty times larger, brighter, brighter and hotter than our own sun. |
| 设想一下，一颗恒星比我们的太阳还要大，还要亮，还要热20倍，
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| 43. | 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，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，
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| 44. | Once we detected a planet, we would have to find a way of blotting out the light from its star , so that we would be able to 'see' the planet properly and analyze its atmosphere. |
| 一旦我们找到这样一颗行星，我们就要想办法将它的恒星射过来的光线遮暗，这样我们就能彻底“看见”这颗行星，并分析它的大气层。
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| 45. | Similarly, our own present primitive chemical rockets, though good enough to orbit men, have no chance of transporting us to the nearest other star , four light years away, let alone distances of tens or hundreds of light years. |
| 同样，我们目前使用的原始化学火箭，虽然把人送入轨道，但尚不能把我们送到离我们最近、相距4光年的其他星球上去，更不用说几十光年或几百光年远的地方了。
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| 46. | She is bent on becoming a film star when she grows up. |
| 她一心想长大后当一名影星。
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| 47. | Her ambition was to be a film star . |
| 她的志向是当电影明星。
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| 48. | The coach had to keep this star player on the bench. |
| 教练不得不让他的明星队员坐在候补队员席上。
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| 49. | Pole Star . |
| 北极星；指导者；向导。
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| 50. | The varsity star became unpopular after he began to throw his weight around. |
| （运动）队明星从他开始自以为了不起后就不受欢迎了。
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