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 48.3%
2 United States 19 21.3%
3 Germany 8 9%
4 France 7 7.9%
5 Netherlands 7 7.9%
6 India 2 2.2%
7 Czech Republic 1 1.1%
8 Russia 1 1.1%
9 South Africa 1 1.1%