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 200 51.5%
2 United States 97 25%
3 Germany 40 10.3%
4 Netherlands 26 6.7%
5 Canada 11 2.8%
6 Kazakhstan 3 0.8%
7 Russia 2 0.5%
8 Singapore 2 0.5%
9 Spain 2 0.5%
10 Czech Republic 2 0.5%
11 Iran, Islamic Republic of 1 0.3%
12 Turkey 1 0.3%
13 Mauritius 1 0.3%