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 251 55.2%
2 United States 103 22.6%
3 Canada 27 5.9%
4 Germany 27 5.9%
5 Netherlands 25 5.5%
6 Hong Kong 5 1.1%
7 India 3 0.7%
8 Norway 2 0.4%
9 Pakistan 2 0.4%
10 2 0.4%
11 Australia 2 0.4%
12 Sweden 2 0.4%
13 Taiwan 2 0.4%
14 Singapore 1 0.2%
15 Kazakhstan 1 0.2%