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 202 62.2%
2 United States 62 19.1%
3 Germany 34 10.5%
4 Netherlands 10 3.1%
5 Korea, Republic of 6 1.8%
6 Singapore 3 0.9%
7 Switzerland 2 0.6%
8 Taiwan 2 0.6%
9 2 0.6%
10 South Africa 1 0.3%
11 Russia 1 0.3%