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 146 67.3%
2 United States 21 9.7%
3 Netherlands 16 7.4%
4 Germany 9 4.1%
5 Russia 7 3.2%
6 Hong Kong 3 1.4%
7 Japan 3 1.4%
8 Malaysia 3 1.4%
9 France 3 1.4%
10 Canada 3 1.4%
11 Australia 2 0.9%
12 Guam 1 0.5%