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 155 62.5%
2 United States 44 17.7%
3 Germany 34 13.7%
4 Canada 3 1.2%
5 Korea, Republic of 2 0.8%
6 France 2 0.8%
7 Norway 2 0.8%
8 Singapore 2 0.8%
9 United Kingdom 2 0.8%
10 Russia 1 0.4%
11 Netherlands 1 0.4%