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 United States 39 35.8%
2 China 37 33.9%
3 Germany 15 13.8%
4 Taiwan 5 4.6%
5 Hong Kong 4 3.7%
6 Bulgaria 2 1.8%
7 Canada 1 0.9%
8 India 1 0.9%
9 Moldova, Republic of 1 0.9%
10 Netherlands 1 0.9%
11 Norway 1 0.9%
12 Russia 1 0.9%
13 Saudi Arabia 1 0.9%