So the wintering period of Hooded Crane at Chongming Dongtan is about 5 months.
因此，白头鹤在崇明东滩的越冬期约为5个月。
The negative accumulated temperature decreased obviously during the over-wintering period.
冬小麦越冬期负积温明显减少。
The negative accumulated temperature decreased obviously during the over-wintering period.
冬小麦越冬期负积温明显减少。
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