求英诗(Sir Patrick Spens)的翻译, 该如何鉴赏此诗?

【原诗】
The King sits in Dunfermline town
Drinking of the blood red wine,
''Where can I get a good sea captain
To sail this mighty ship of mine?''
Then up there spoke a bonny boy
Sitting at the King's right knee,
''Sir Patrick Spens is the very best seaman
That ever sailed upon the sea.''
The King has written a broad letter
And sealed it up with his own right hand,
Sending word unto Sir Patrick
To come to him at his command.
''An enemy then this must be
Who told a lie concerning me,
For I was never a very good seaman
Nor ever do intend to be.''
''Last night I saw the new moon
With the old moon in her arm,
A sign, the sign since we were born
That means there'll be a deadly storm.''
They had not sailed upon the sea
A day, a day, but barely three,
When loud and boisterous grew the winds
And loud and