编码字符集、字符编码 编码字符集： 表示某种编码所涉及到字符的集合。例如ASCII字符集、GB2312字符集。仅表示集合，集合元素（即字符）按照

upstream cppver { consistent_hash $remote_addr; server 127.0.0.1:8090; } upstream gover { consistent_hash $remote_addr; server 127.0.0.1:8091; } upstream gover2 { consistent_hash $remote_addr; server 127.0.0.1:8092; } server { listen 8088; server_name test.com; location / { mirror /mirror; mirror /mirror2; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://cppver$request_uri; } location /mirror { internal; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://gover$request_uri; } location /mirror2 { internal; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://gover2$request_uri; } }

形而上、形而下 《周易》：在天成象，在地成形 《系辞》： 1 2 3 4 5 6 7 乾坤，其《易》之蕴邪？乾坤成列，而《易》立乎其中矣。乾坤毁，则无以见《易》