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74 explores time-dependent quantum mechanics and spectroscopy. Topics covered include: perturbation theory, two-level systems, light-matter interactions, relaxation in quantum systems, correlation functions and linear response theory, and nonlinear spectr
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74探索与时间相关的量子力学与光谱学，课题包含：微扰理论、双能级系统、光与物质之作用、量子系统的松弛过程、相关函数与线性响应理论，以及非线性光谱学。 |
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74 we shall be on time, i hope.
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我希望我们将按时到达。 |
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74 where everything around you is bathed in light.
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在这里每件东西都沉浸在阳光里。 |
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740 The manager needs an assistant that he can count on to take care of problems in his absence.
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这个经理需要一个信得过的助手，当他不在时，去处理各种问题. |
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741 She called you up in your absence.
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你不在时他打了个电话给你. |
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743 The fifth generation computer with artificial intelligence, are being developed and perfected.
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具有人工智能的第五代计算机正在被开发和完善. |
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744 It is no use trying to persuade him.
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试图说服他是没有用的. |
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744 We were pleased to hear from your letter of 6 August that you were impressed with our selection of toys.
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我们很高兴收到你方8月6日来函得知你方对我们的玩具非常感兴趣。 |
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745 We have a wide selection of sweaters that will appeal to all ages, and in particular the teenager market which you specified.
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我们有各种各样适合各个年龄层次的羊毛衫，特别是您专门提到的青少年市场。 |
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746 The father was unwilling to give his son the key to his car.
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父亲不愿意把汽车钥匙给他的儿子. |
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747 Mary found it difficult to adjust at first, but she soon got used to it.
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刚开始的时候，玛丽觉得很难适应，但后来很快就习惯了. |
