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 158 50.5%
2 United States 71 22.7%
3 Netherlands 23 7.3%
4 Germany 20 6.4%
5 Taiwan 14 4.5%
6 Canada 6 1.9%
7 Hong Kong 5 1.6%
8 India 5 1.6%
9 Ukraine 3 1%
10 Singapore 2 0.6%
11 Kazakhstan 2 0.6%
12 Brazil 2 0.6%
13 France 1 0.3%
14 Moldova, Republic of 1 0.3%