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 United States 62 36.3%
2 China 42 24.6%
3 Netherlands 25 14.6%
4 Germany 16 9.4%
5 Algeria 9 5.3%
6 France 4 2.3%
7 Korea, Republic of 4 2.3%
8 Russia 3 1.8%
9 Canada 3 1.8%
10 Taiwan 2 1.2%
11 South Africa 1 0.6%