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 193 57.4%
2 United States 80 23.8%
3 Netherlands 21 6.2%
4 Germany 17 5.1%
5 Korea, Republic of 7 2.1%
6 France 6 1.8%
7 Russia 5 1.5%
8 Philippines 3 0.9%
9 Moldova, Republic of 1 0.3%
10 Bulgaria 1 0.3%
11 Canada 1 0.3%
12 Ukraine 1 0.3%