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 112 45.9%
2 United States 69 28.3%
3 Germany 14 5.7%
4 Netherlands 13 5.3%
5 Canada 9 3.7%
6 Taiwan 8 3.3%
7 Korea, Republic of 7 2.9%
8 France 5 2%
9 Russia 2 0.8%
10 Moldova, Republic of 2 0.8%
11 Singapore 1 0.4%
12 Sweden 1 0.4%
13 India 1 0.4%