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 43 32.6%
2 United States 36 27.3%
3 Netherlands 23 17.4%
4 Germany 10 7.6%
5 Korea, Republic of 9 6.8%
6 France 5 3.8%
7 Czech Republic 2 1.5%
8 Canada 1 0.8%
9 Hong Kong 1 0.8%
10 Russia 1 0.8%
11 United Kingdom 1 0.8%