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 125 67.6%
2 United States 20 10.8%
3 Germany 14 7.6%
4 France 7 3.8%
5 Netherlands 4 2.2%
6 Russia 4 2.2%
7 Taiwan 3 1.6%
8 Brazil 2 1.1%
9 Iran, Islamic Republic of 2 1.1%
10 Singapore 2 1.1%
11 Spain 1 0.5%
12 Hong Kong 1 0.5%