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 71 44.4%
2 United States 46 28.8%
3 Netherlands 16 10%
4 France 10 6.2%
5 Germany 7 4.4%
6 Russia 4 2.5%
7 Hong Kong 2 1.2%
8 Canada 2 1.2%
9 Korea, Republic of 1 0.6%
10 Czech Republic 1 0.6%