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 228 49.1%
2 United States 161 34.7%
3 Germany 51 11%
4 Taiwan 4 0.9%
5 Netherlands 4 0.9%
6 Mexico 2 0.4%
7 Switzerland 2 0.4%
8 Hong Kong 2 0.4%
9 India 2 0.4%
10 Canada 2 0.4%
11 Italy 2 0.4%
12 Mauritius 1 0.2%
13 Australia 1 0.2%
14 Ireland 1 0.2%
15 Nigeria 1 0.2%