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 143 48.6%
2 United States 63 21.4%
3 Germany 37 12.6%
4 Korea, Republic of 12 4.1%
5 Canada 9 3.1%
6 Malaysia 8 2.7%
7 Switzerland 5 1.7%
8 Russia 3 1%
9 Australia 3 1%
10 Finland 2 0.7%
11 Singapore 2 0.7%
12 Taiwan 2 0.7%
13 Turkey 2 0.7%
14 Ukraine 1 0.3%
15 South Africa 1 0.3%
16 Moldova, Republic of 1 0.3%