Concavely
[建] 凹的
🗣️ 情景例句
What are you getting at?
你想说明什么？
He is working on a book about the Vietnam War.
他正在写一本关于越战的书。
I went downstairs and sat in front of the television pretending to read.
便来到楼下坐在电视机前假装看书。