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 199 58.9%
2 United States 61 18%
3 Germany 35 10.4%
4 Korea, Republic of 6 1.8%
5 Taiwan 6 1.8%
6 India 5 1.5%
7 Singapore 4 1.2%
8 Spain 3 0.9%
9 Russia 3 0.9%
10 Lithuania 3 0.9%
11 Czech Republic 3 0.9%
12 Canada 3 0.9%
13 Bulgaria 2 0.6%
14 Norway 2 0.6%
15 United Kingdom 2 0.6%
16 Netherlands 1 0.3%