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. 乱兜圈子的;成群乱转的The people in a milling crowd move around within a particular place or area, so that the movement of the whole crowd looks very confused.
1. corrugated edge of a coin
多通过句子记忆单词，而不是单独死记硬背。
