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 42 43.8%
2 United States 18 18.8%
3 Netherlands 10 10.4%
4 Russia 9 9.4%
5 France 5 5.2%
6 India 3 3.1%
7 Ukraine 3 3.1%
8 Czech Republic 2 2.1%
9 Germany 1 1%
10 Canada 1 1%
11 Singapore 1 1%
12 United Arab Emirates 1 1%