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 300 64.9%
2 United States 87 18.8%
3 Germany 40 8.7%
4 Taiwan 9 1.9%
5 Singapore 6 1.3%
6 Canada 4 0.9%
7 Russia 4 0.9%
8 Korea, Republic of 3 0.6%
9 Ukraine 3 0.6%
10 Netherlands 2 0.4%
11 Hong Kong 2 0.4%
12 Australia 1 0.2%
13 Macao 1 0.2%