Underframing
底层框架的材料或结构部件
🗣️ 情景例句
She went to a school-board meeting.
她去参加联合校董会的会议。
There is a small choice in rotten apples.
朽木不可雕。
After having spent whole mornings on the river, I always go home with an empty bag.
我总是在河上呆上整整一上午，然后空着袋子回家。