Underpinned
v. 用砖石结构等从下面支撑（墙等）( underpin的过去式和过去分词 ); 加固（墙等）的基础; 为（论据、主张等）打下基础; 加强
🗣️ 情景例句
Something else I was wondering about was...
我想知道其它事是^
You look tired. Have you been getting enough sleep?
你似乎累了。睡眠充足吗？
Excuse me! Are you from the USA?
对不起，你是美国人吗？