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 199 60.3%
2 United States 61 18.5%
3 Germany 37 11.2%
4 Canada 12 3.6%
5 Netherlands 11 3.3%
6 Russia 3 0.9%
7 Japan 2 0.6%
8 Ukraine 2 0.6%
9 Hong Kong 1 0.3%
10 Singapore 1 0.3%
11 Poland 1 0.3%