单词学习：omen 名词
omen
/ˈəʊmən/
预兆，征兆
The sudden dark clouds were considered an omen by Gu Laoshi, who decided to postpone the outdoor class.
突然出现的乌云被顾老师视为一个预兆，他决定推迟户外课程。
单词卡片
卡片已就绪
