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 159 67.7%
2 United States 27 11.5%
3 Netherlands 17 7.2%
4 France 9 3.8%
5 Germany 7 3%
6 Korea, Republic of 7 3%
7 Poland 3 1.3%
8 Russia 3 1.3%
9 Taiwan 2 0.9%
10 India 1 0.4%