BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 72 69.9%
2 United States 10 9.7%
3 Germany 5 4.9%
4 Hong Kong 4 3.9%
5 Korea, Republic of 4 3.9%
6 Taiwan 4 3.9%
7 Japan 2 1.9%
8 Canada 1 1%
9 Lao People's Democratic Republic 1 1%