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 256 53.3%
2 United States 135 28.1%
3 Germany 45 9.4%
4 Canada 21 4.4%
5 Netherlands 8 1.7%
6 Ireland 4 0.8%
7 Taiwan 3 0.6%
8 Romania 2 0.4%
9 Saudi Arabia 1 0.2%
10 Moldova, Republic of 1 0.2%
11 Austria 1 0.2%
12 Hong Kong 1 0.2%
13 Ukraine 1 0.2%
14 United Kingdom 1 0.2%