Rarefactive
a. 稀少的, 稀薄的, 純凈的, 稀疏的
??? 情景例句
Who ever heard of a pet goat?
有誰聽過寵物羊的??？
Soon up, soon down.
升得高，落得快。
The tiny village of Frinley is said to possess a 'cursed tree'.
據說弗林利這個小村里有一棵“該詛咒的樹”。