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 70 54.7%
2 Netherlands 12 9.4%
3 Korea, Republic of 11 8.6%
4 Germany 11 8.6%
5 United States 8 6.2%
6 Iran, Islamic Republic of 4 3.1%
7 France 3 2.3%
8 Malaysia 3 2.3%
9 Russia 3 2.3%
10 Taiwan 2 1.6%
11 Norway 1 0.8%