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 233 61.8%
2 United States 78 20.7%
3 Germany 32 8.5%
4 Netherlands 20 5.3%
5 Taiwan 5 1.3%
6 Singapore 2 0.5%
7 United Kingdom 2 0.5%
8 Ukraine 1 0.3%
9 Romania 1 0.3%
10 Hong Kong 1 0.3%
11 Mexico 1 0.3%
12 Moldova, Republic of 1 0.3%