多普勒超声检查是什么
An egret flies at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
Egrets perch at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
An egret is pictured among mangroves at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
This aerial photo taken on Jan. 31, 2025 shows a view of the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
Visitors are pictured at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
Egrets perch at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
This aerial photo taken on Jan. 31, 2025 shows a view of the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
This aerial photo taken on Jan. 31, 2025 shows a view of the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
An egret forages at the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province, Jan. 31, 2025. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
This aerial photo taken on Jan. 31, 2025 shows a view of the Hainan Lingshui Mangrove National Wetland Park in south China's Hainan Province. Home to thousands of waterfowl, the park covering 958.22 hectares has resulted from uncompromising efforts of the local authorities since 2016 to restore and protect the mangrove ecological systems. (Xinhua/Pu Xiaoxu)
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