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 237 51%
2 United States 150 32.3%
3 Germany 38 8.2%
4 Netherlands 19 4.1%
5 Canada 4 0.9%
6 Russia 3 0.6%
7 Sweden 3 0.6%
8 Switzerland 2 0.4%
9 Taiwan 2 0.4%
10 Hong Kong 2 0.4%
11 Japan 2 0.4%
12 Malaysia 2 0.4%
13 Brazil 1 0.2%