整个旅途中他们歌声不断。

They sang songs throughout the trip.

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约翰·希尔·德布兰：从上世纪60年代至今，这种动物已经将他们歌声的音高降低了大约30%。

John Hildebrand: the animals had decreased the pitch of their songs by about 30% from the 1960s to today.

youdao

一到多佛，他们就用歌声和欢呼来庆祝他们的到来。

Once they hit Dover, they celebrated their arrival with songs and whoops.

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