Vallum
n. 壁垒, 垒墙\\n[医] 冈, 廓
🗣️ 情景例句
Use a dictionary and grammar guide constantly.
经常使用字典和语法指南。
Turn your tongue seven times before speaking.
话到嘴边留三分。
An enterprise has to incur certain costs and expenses in order to stay in business.
一个企业为了继续经营，不得不支出一定的费用和开销。