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 263 65.4%
2 United States 55 13.7%
3 Germany 38 9.5%
4 Netherlands 20 5%
5 Canada 7 1.7%
6 Korea, Republic of 7 1.7%
7 Hong Kong 4 1%
8 Brazil 2 0.5%
9 France 2 0.5%
10 Slovakia 2 0.5%
11 Ukraine 1 0.2%
12 Russia 1 0.2%