Peter now began to call loudly and to whistle, and soon all the goats were assembled on the green field.

彼得开始大声地叫着，吹着口哨，很快所有的山羊都聚集在绿色的草地上。

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This color image was assembled from a series of exposures taken within 36 hours of the Mars closest approach with Hubble's Wide Field and Planetary Camera 2.

这一彩色图像是通过哈勃太空望远镜和行星照相机2在36小时内采集的最接近火星的一系列图片中组合出来的。

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We have assembled an outstanding group of speakers who are experts in their field.

我们已经组建了一个优秀的小组发言者都是各自领域的专家。

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The first maps not only record the three components but also compare their signals to the best available gravity field models assembled from existing space- and ground-acquired data-sets.

BBC: Europe's Goce satellite probes Earth's gravity