Underpinning
n. 基础材料, 支承结构
✅ 同义词
🗣️ 情景例句
You are wonderful with kids.
你对小孩子有一套。
Sorry, but she is out.
很抱歉，她出去了。
Is there anything else I can do for you?
还有什么事我可以帮忙吗？