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 160 60.4%
2 United States 54 20.4%
3 Netherlands 15 5.7%
4 Germany 9 3.4%
5 Russia 8 3%
6 France 5 1.9%
7 Portugal 4 1.5%
8 Taiwan 3 1.1%
9 Hong Kong 3 1.1%
10 Korea, Republic of 2 0.8%
11 Canada 2 0.8%