Observations of the Arctic reveal that the Arctic Ocean is covered by less ice each summer than the previous summer.
对北极的观察显示,每个夏天北冰洋上面覆盖的冰川都比前一个夏天的要少。
They are deployed each summer to help swimmers in need of rescue。
每到夏天,这些救生犬会被增派到各个海滩度假地,帮助救援溺水者。
Each summer, musicians from around the country perform classical music at the Grand Teton Music Festival.
VOA: special.2009.02.16
More than three-hundred-fifty kinds of birds visit the island each summer.
VOA: special.2011.07.25
Hundreds of thousands of people visit Cape May each summer.
VOA: special.2009.06.01
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