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 171 61.3%
2 United States 48 17.2%
3 Germany 31 11.1%
4 Canada 12 4.3%
5 Singapore 6 2.2%
6 Russia 3 1.1%
7 Poland 2 0.7%
8 India 2 0.7%
9 Korea, Republic of 1 0.4%
10 Moldova, Republic of 1 0.4%
11 Netherlands 1 0.4%
12 Cameroon 1 0.4%