State trooper
（美国）州警察
🧩 词语组成解析
trooper
[['tru:pə]]
n. 骑兵, 骑警, 伞兵
🗣️ 情景例句
Do you think we could go out together sometime?
你觉得什么时候我们可以一起出去？
After a while,we found a shady place under some poplar trees.
在一会儿以后，我们在一些白杨树下面发现了一块遮阴的地方。
Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.
藏书使教育成为可能，而教育反过来又丰富了藏书，因为知识的增长遵循着一种“滚雪球”的规律。印刷术的发明又大大提高了知识增长的速度。