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 47 52.2%
2 United States 18 20%
3 Netherlands 8 8.9%
4 Canada 6 6.7%
5 Korea, Republic of 6 6.7%
6 Germany 2 2.2%
7 United Kingdom 2 2.2%
8 Lao People's Democratic Republic 1 1.1%