Underpinning
n. 基础材料, 支承结构
✅ 同义词
🗣️ 情景例句
then you've got to smile first.
你就得先笑一笑。
Why do you dislike the medicine so much?
为什么你如此不喜欢药？
Long ago, people believed that the world was flat.
很久以前人们相信地球是平的。