Infrastructrue
n. 深部构造；基底；下地壳层；下部结构设施
🗣️ 情景例句
When does he arrive?
他什么时候到？
He often plays golf.
他常常去打高尔夫球。
Both the police and the workmen were grateful to the student for this piece of advance information.
警察与工人都对那个学生事先通报情况表示感谢。