swirling 和 whirling 有什么区别?

英语翻译
Snow was swirling against the icy windows once more; Christmas wasapproaching fast.
Hagrid had already single- handedly deliveredthe usual 12 Christmas trees to the Great Hall;
garlands of holly and tinsel had been
twisted around the banisters of the stairs; everlasting candles glowed from
inside the helmets of suits of armor and great bunches of mistletoe had been
hung at intervals along the corridors.Large groups of girls tended to converge
underneath the mistletoe bunches every time Harry went past,Which caused blockages
in the corridors; fortunately,however,Harry’s frequent nighttime wanderings
had given him an unusually good knowledge of the castle’s secret passageways,
so that he was often,without too much difficulty,able to navigate
mistletoe-free routes between classes.
Ron,who might once have found the necessity of these detours excuse
for jealousy rather than hilarity,simply roared with laughter about it all.
Although Harry much preferred this new laughing,joking Ron to the moody,
aggressive model he had been enduring for the last few weeks,the improved Ron
came at a heavy price.Firstly,Harry had to put up with the frequent presence
of Lavender Brown,who seemed to regard any moment that she was not kissing Ron
as a moment wasted; and secondly,Harry found himself once more the best friend
of two people who seemed unlikely ever to speak to each other again.
“She can’t complain,” he told Harry.“She snogged Krum.So she’s
found out someone wants to snog me too.Well,it’s a free country.I haven’t
done anything wrong.”
Harry did not answer,but pretended to be absorbed in the book they
were supposed to have read before Charms next morning (Quintessence:A Quest).
Determined as he was to remain friends with both Ron and Hermione,he wasspending a lot of time with his mouth shut tight.

i like standing safely in the middle of a swirling mass of stinging insects.no one else is brave enough.