多种环境因素都起到作用，例如，积雪过多会让树木透不过气，雪崩和雪移能摧毁树木；

Various environmental factors may play a role. Too much snow, for example, can smother trees, and avalanches and snow creep can damage or destroy them.

youdao

“我相信是幻觉，”赫敏说，显得有点紧张，“黑暗中的雪，容易让人的眼睛产生错觉……但也许我们应该在隐形衣下面幻影移形，以防万一，对吗？”

"I'm sure I imagined it," said Hermione, looking nervous. "the snow in the dark, it plays tricks on your eyes."... But perhaps we ought to Disapparate under the Invisibility Cloak, just in case?

youdao

“我相信是幻觉，”赫敏说，显得有点紧张，“黑暗中的雪，容易让人的眼睛产生错觉……但也许我们应该在隐形衣下面幻影移形，以防万一，对吗？”

"I'm sure I imagined it," said Hermione, looking nervous. "the snow in the dark, it plays tricks on your eyes."... But perhaps we ought to Disapparate under the Invisibility Cloak, just in case?

youdao