The arctic winter, the coldest since 1957, froze rivers and channels, and disrupted transport links to some islands in the Baltic Sea.
这个1957年来最冷的冬天里，河流和运河被冰封，通往某些波罗的海小岛的运输联系也中断了。
On a very cold day, during a very cold winter, sheets of ice float on the Vistula River and out toward the Baltic Sea.
在寒冷的冬季里，有一天，天气非常的冷，维斯瓦河上漂浮着大片大片的浮冰，缓缓向着波罗的海漂去。
The water of the Baltic is not very salty because many fresh rivers flow into it, so it freezes more easily. Many of its ports are blocked by ice in winter.
另外一个原因是有不少淡水河流入波罗的海，造成该海的含盐度较低，冬季容易结冰。
The water of the Baltic is not very salty because many fresh rivers flow into it, so it freezes more easily. Many of its ports are blocked by ice in winter.
另外一个原因是有不少淡水河流入波罗的海，造成该海的含盐度较低，冬季容易结冰。
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