单词：time-of-flight method
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我上个月坐火车到纽约去看朋友，上车后刚要坐下，旁边座位上的女乘客就开始很大声的自言自语，看上去精神好像不太正常，吓得我只好在过道对面远远地坐下。 后来我注意到，每次有人要
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作文题目： About Online course 参考范文： Online course, as a new teaching method based on computer and Internet,allows teachers to give classes from a distance away.It is becoming more than popular in colleges and universities,and acts as
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Shall we take a vote? 我们是否要投票决定？ Shall we take a vote? 我们是否要投票决定？ It seems to be the best method. 这似乎是最好的办法了。 It's time we get back to business. 我们该回到正题上了。 It's time we
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Science and technology 科学技术 Air travel 飞机旅行 Please be seated 请就坐 A faster way of boarding planes could save time and money 一种更快速的登机方法可以节约时间和金钱 THE job of the professional astrophysicist is t
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