Underframing
底层框架的材料或结构部件
🗣️ 情景例句
You're in great condition.
你状态挺好的。
Scientists contribute to the well-being of mankind.
科学家为人类造福。
In a few minutes he returned with my bag and gave it back to me.
一会儿工夫他拿着我的提包回来了，把它还给了我。