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 86 59.7%
2 United States 19 13.2%
3 Netherlands 17 11.8%
4 France 8 5.6%
5 Russia 4 2.8%
6 Germany 3 2.1%
7 Czech Republic 2 1.4%
8 Singapore 2 1.4%
9 Canada 2 1.4%
10 Taiwan 1 0.7%