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 189 55.1%
2 United States 71 20.7%
3 Germany 29 8.5%
4 Netherlands 18 5.2%
5 Canada 13 3.8%
6 Ukraine 8 2.3%
7 Russia 4 1.2%
8 Sweden 4 1.2%
9 Taiwan 2 0.6%
10 Hong Kong 2 0.6%
11 France 2 0.6%
12 Moldova, Republic of 1 0.3%