Undergirds
vt. 在底部加固（undergird的第三人称单数形式）
🗣️ 情景例句
Thank you, Mr. Riley. We'll read this over carefully.
谢谢你 Riley先生。我们会仔细阅读这些。
I had no idea.
真没想到。
He must, for example, perceive an egg as a simple single solid shape,
以鸟蛋为例，观赏者必须感觉到它是一个单一的实体形态，