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 191 49.6%
2 United States 118 30.6%
3 Germany 34 8.8%
4 Canada 17 4.4%
5 Singapore 5 1.3%
6 United Kingdom 4 1%
7 Russia 3 0.8%
8 Brazil 3 0.8%
9 Korea, Republic of 3 0.8%
10 Lithuania 3 0.8%
11 Netherlands 2 0.5%
12 Australia 1 0.3%
13 Mexico 1 0.3%