They threaded the paths of the forest at dawn.

他们在拂晓时穿过森林小路。

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The scientists recorded the dawn chorus and used playback experiments to see if they could trigger one of a forest-wide calls to find out more about why the animals joined in.

科学家把“黎明大合唱”给记录下来，并使用声音回放实验，来看看他们是否能引发出一个森林范围内的“猴吼”，来更深入地了解它们加入大合唱的原因。

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The dance starts with the awakening of the peacock at dawn in the forest. It looks around, struts proudly, drinks from the river and preens its feathers.

舞蹈从清晨森林里的孔雀醒来开始，它东张西望，骄傲的走来走去，在河里喝水，用嘴梳理羽毛。

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The researchers, who report their findings in a Sept. 19 paper in the journal PLoS ONE, say the site of the Panda pipe was covered with a forest of Metasequoia, similar to today's dawn redwoods, during the early Eocene.

MSN: 50-million-year-old redwood chunk found