单词学习：bark 名词/动词
bark
/bɑːrk/
1. 树皮 2. 狗吠声 3. 厉声说话
Gu Laoshi pointed at the tree and explained that the rough outer covering is called bark.
顾老师指着树解释说，那粗糙的外层叫做树皮。
单词卡片
卡片已就绪
