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 106 55.8%
2 United States 31 16.3%
3 Netherlands 14 7.4%
4 Germany 12 6.3%
5 Hong Kong 9 4.7%
6 France 7 3.7%
7 Russia 4 2.1%
8 Canada 3 1.6%
9 Korea, Republic of 2 1.1%
10 Sweden 1 0.5%
11 Czech Republic 1 0.5%