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. 水合物A hydrate is a chemical compound that contains water.
2. 为（皮肤）补水If a substance hydrates your skin, it makes it softer and less dry.
1. any compound that contains water of crystallization
多通过句子记忆单词，而不是单独死记硬背。
