而在那之后的第十年，摩托罗拉才终于在1983年推出了第一支商用的行动电话Dyna-TAC，这款手机重1磅，售价惊人的达到了3500美元。

It would be ten years before Motorola finally introduced the Dyna-TAC, the first commercially available mobile phone, into service in 1983. The device weighed 1lb and cost a staggering $3,500 .

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后来，她才意识到，那个人是一位重要的同事，她很担心自己的反应会被别人当作无礼的怠慢。

She later realised, however, that the person was an important colleague and feared that her failure to acknowledge their presence could be interpreted as a snub.

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他们的衣服首先重实用，其次才讲花式。

Their clothing is primarily functional and only secondarily decorative.

《牛津词典》

Listen for a while and your body almost will start to tell you start to signal to you, where the downbeat is.

听一会,然后你们的身体大致才会告诉你们,开始给你们信号,告诉你重拍在哪里

耶鲁公开课 - 聆听音乐课程节选

He goes back and redoes the calculation, only in this case he says what I am going to do is I am going to redo the calculation for helium, but I am going to consider not just the mass of the electron but the reduced mass of the system.

他回去重新做了计算，仅在这种情况下他才会说说我将要,为氦重做计算，但我认为,不只是电子的质量,还有系统质量的减少量。

麻省理工公开课 - 固态化学导论课程节选