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. especially of a ship's lines etc
e.g. with its sails afoula foul anchor
Synonym: afoul(ip)foul
2. made dirty or foul
e.g. a building befouled with sootbreathing air fouled and darkened with factory soot
Synonym: befouled
多通过句子记忆单词，而不是单独死记硬背。
