Salmon also carry dangerous chemicals as the fish migrate between rivers and the sea.
鲑鱼在河流和海洋之间迁徙时也会携带危险的化学物质。
Life on the sea, as any fisherman or sailor could tell you, is hard and dangerous.
海上的生活，正如任何渔夫或水手都会告诉你的那样，既艰苦又危险。
But life on the sea, as any fisherman or sailor could tell you, is hard and dangerous.
其实，海上的生活——任何一位渔夫或水手都会这么跟你说——是很艰苦很危险的。
The sea around here is dangerous to swim in.
在这附近的海边游泳是危险的。
The Dogger Bank in the North Sea can be dangerous for ships.
北海的多格尔沙洲对船舶有危险。
What do you think is the most dangerous thing you can see in the sea?
你认为海洋里可见的最危险的是什么？
Bank in the North Sea can be dangerous for ships.
北海的多格尔沙洲对船舶有危险。
Buoy floats on the sea to mark a safe or dangerous area.
浮标漂浮在海上标记出安全和危险区域。
Buoy floats on the sea to mark a safe or dangerous area.
浮标漂浮在海上标记出安全和危险区域。
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