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 22 26.2%
2 United States 22 26.2%
3 Netherlands 18 21.4%
4 Canada 8 9.5%
5 Germany 7 8.3%
6 Russia 3 3.6%
7 Czech Republic 2 2.4%
8 Singapore 1 1.2%
9 Portugal 1 1.2%