The British Trust for Ornithology found that, in the period 1971-1995, 51 species of birds tended to nest and lay eggs earlier (around a week or more on average) as background temperatures increased.
英国鸟类学信托基金会(The British Trust for Ornithology)发现，在1971- 1995年期间，由于背景温度升高，51种鸟倾向于提前筑巢下蛋(平均约一周或更长时间)。
The Woodland Trust and the British Trust of Ornithology want nature-goers to send them information about cuckoo-sightings for a survey on changes to Britain's seasons.
林地信托基金会和英国鸟类学信托基金会希望去野外的人们把看到杜鹃的情况告知他们，以便完成一项关于英国季节变化的调查。
The Woodland Trust and the British Trust of Ornithology want nature-goers to send them information about cuckoo-sightings for a survey on changes to Britain's seasons.
林地信托基金会和英国鸟类学信托基金会希望去野外的人们把看到杜鹃的情况告知他们，以便完成一项关于英国季节变化的调查。
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