Infrastructrue
n. 深部构造；基底；下地壳层；下部结构设施
🗣️ 情景例句
What are you afraid of?
你怕什么
Too much knowledge makes the head bald.
知识多，老得快。
What was the population of the less developed countries in 1950?
1950年不太发达国家的人口是多少？