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 243 47.4%
2 United States 201 39.2%
3 Germany 30 5.8%
4 Canada 16 3.1%
5 Hong Kong 7 1.4%
6 Russia 5 1%
7 Singapore 3 0.6%
8 Switzerland 3 0.6%
9 South Africa 2 0.4%
10 Albania 2 0.4%
11 Netherlands 1 0.2%