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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