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 55 53.9%
2 United States 17 16.7%
3 Netherlands 8 7.8%
4 Germany 5 4.9%
5 Russia 3 2.9%
6 Kazakhstan 2 2%
7 Korea, Republic of 2 2%
8 India 2 2%
9 Australia 2 2%
10 United Kingdom 2 2%
11 Japan 1 1%
12 France 1 1%
13 Malaysia 1 1%
14 Turkey 1 1%