黑霜,黑冻;
A fortnight later, when the snow had gone, and had been followed by a hard black frost, she took advantage of the state of the roads to try the experiment.
两个礼拜以后,风雪过去了,接着又是一场严酷的霜冻,她就利用道路冻住了的时候去进行这次拜访。
In this area black frost usually comes first in early December.
这个地区通常在12月初开始出现严霜.
On that bleak hill top the earth was hard with a black frost, and the air made me shiver through every limb.
在那荒凉的山顶上,土地由于结了一层黑冰而冻得坚硬,冷空气使我四肢发抖。
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