n.（江河入海的）河口，河口湾，港湾
The stream debouches into the estuary.
这条河流入河口湾.
We moored in the estuary, waiting for high tide.
我们在港湾停泊, 等待涨潮.
We live near the Thames estuary.
我们的住处靠近泰晤士河入海口.
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