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 170 46.1%
2 United States 121 32.8%
3 Germany 28 7.6%
4 Netherlands 25 6.8%
5 Canada 10 2.7%
6 Singapore 3 0.8%
7 Taiwan 3 0.8%
8 Switzerland 2 0.5%
9 Australia 2 0.5%
10 Denmark 2 0.5%
11 France 2 0.5%
12 Israel 1 0.3%