Subterraneous
a. 地下的, 隱匿的
? 同義詞
??? 情景例句
There are abundant free materials available on the internet.
因特網上有豐富的免費資料提供。
Watch out, it's dangerous.
注意，危險?。?/div>
Do you want beef or lamb?
您要牛肉還是要羔羊肉？