点击下方单词,选择对的这个单词
点击下面链接下载与本句相关的学习资源，包括PDF教材和音频练习，方便课后复习：
1. a small illustrative sketch (as sometimes placed at the beginning of chapters in books)
2. a photograph whose edges shade off gradually
3. a brief literary description
Synonym: sketch
多通过句子记忆单词，而不是单独死记硬背。
