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 176 54%
2 United States 69 21.2%
3 Germany 45 13.8%
4 Canada 12 3.7%
5 Taiwan 7 2.1%
6 Korea, Republic of 6 1.8%
7 Spain 3 0.9%
8 United Kingdom 3 0.9%
9 Russia 2 0.6%
10 Ukraine 1 0.3%
11 Netherlands 1 0.3%
12 Poland 1 0.3%