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 316 47.2%
2 United States 124 18.5%
3 Netherlands 110 16.4%
4 Germany 68 10.2%
5 Canada 15 2.2%
6 France 5 0.7%
7 Taiwan 5 0.7%
8 Ukraine 5 0.7%
9 United Kingdom 5 0.7%
10 Hong Kong 4 0.6%
11 Lao People's Democratic Republic 3 0.4%
12 Finland 2 0.3%
13 Korea, Republic of 2 0.3%
14 Thailand 2 0.3%
15 Norway 1 0.1%
16 Macao 1 0.1%
17 India 1 0.1%