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The simple understanding is that photometry is in charge of the light and shade distribution of the whole photo, with the central focus on photometry and uniform light and shade of the photo. The spot metering is more suitable for shooting the actors on the stage, that is, taking the actors as metering spots, and the photos taken are based on the brightness of the actors, rather than the shady scenes around the actors.该剧讲述了主人公朝永兰丸与朋友为寻找神秘温泉艺人而前往各地温泉，却总被卷入怪异事件并用神奇的舌头查明真相的故事。杨长帆当即撸起袖管比划起来，拿弗朗机来说，胜在子母铳，一铳六炮发完，立刻换一柄子铳，只要温度控制得当，续航持久，在下以为编队三人为宜，一人装铳，一人点火，一人报准。像后来的战国四大名将之一的李牧，便是掌控骑兵的高手，在对付匈奴和秦国的过程中屡次建功。In my opinion, some variants of SYN cache technology should be embedded into the server operating system as a curing function, and these variants can be deployed together with other solutions (address-based filtering, ACK camouflage firewall, IP security protocol, etc.) when appropriate. At present, many experts are also working on more robust TCP protocols and hope that these supplementary protocols can be deployed as soon as possible.小葱帮哥哥号了脉。The full name of UDP protocol is user datagram protocol. It is used to process data packets like TCP protocol in the network and is a connectionless protocol. In the OSI model, the fourth layer, the transport layer, is the next layer above the IP protocol. UDP has the disadvantages of not providing packet grouping, assembling and sorting packets, that is, when the message is sent, it is impossible to know whether it arrives safely and completely.