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 182 62.8%
2 United States 54 18.6%
3 Germany 33 11.4%
4 Canada 11 3.8%
5 Russia 4 1.4%
6 Hong Kong 2 0.7%
7 Netherlands 2 0.7%
8 Poland 1 0.3%
9 Singapore 1 0.3%