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 230 57.1%
2 United States 77 19.1%
3 Germany 36 8.9%
4 Netherlands 28 6.9%
5 Canada 20 5%
6 Korea, Republic of 4 1%
7 Singapore 2 0.5%
8 Spain 2 0.5%
9 France 2 0.5%
10 Brazil 1 0.2%
11 Egypt 1 0.2%