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. 保管人;看守人;管理人The custodian of an official building, a companies' assets, or something else valuable is the person who is officially in charge of it.
1. one having charge of buildings or grounds or animals
Synonym: keepersteward
多通过句子记忆单词，而不是单独死记硬背。
