Exostructure
外壳承载的结构
🗣️ 情景例句
You did a great job.
做得好。
I know the boy whose father is a professor.
我知道那个男孩的父亲是大学教授。
The use of pesticides and fertilizers produces cheap grain and vegetables.
使用杀虫剂和化肥生产出廉价的谷物和蔬菜。