That can mean only one thing at sea--dirty weather. Suddenly a dark cloud swept across the sun, blotting it out and leaving the earth in shadow.

在航海时这种情况只意味着一件事——暴风雨要来了。突然间，一团黑云扫向太阳，遮住了它，给大地蒙上了阴影。

" Very well. Try to keep a straight course, my little captain, and if you see dirty weather ahead, call on your first mate" .

“很好。尽量保持直线航向， 我的小船长， 如果你看到前方天气恶劣， 请呼叫你的大副” 。