Cavitary
腔的, 空洞的
🗣️ 情景例句
What does that mean in plain English?
你能不能用大白话解释一下？
He who rides a tiger is afraid to dismount.
骑虎者难下。
The hovercraft is particularly useful in large areas with poor communications such as Africa or Australia;
气垫船在非洲、澳大利亚等交通不发达地区特别有用。