BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 19 34.5%
2 United States 16 29.1%
3 Canada 9 16.4%
4 France 3 5.5%
5 United Kingdom 2 3.6%
6 Germany 1 1.8%
7 Korea, Republic of 1 1.8%
8 Netherlands 1 1.8%
9 Peru 1 1.8%
10 Russia 1 1.8%
11 Spain 1 1.8%