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葫芦和板栗听了大怒，都道早知这样，先前就该一脚踹死他。For example, in the back-end system, There are tabular data, Each piece of data is preceded by a check box button, When you click the check box button, After obtaining the id, it needs to be passed to the server to send an ajax request. The server needs to record this data, To request, if we send an http request to the server every time we click, For the server, the pressure is relatively high and the network requests are frequent. However, if the real-time data of the system is not very high now, we can collect all ID for a period of time (e.g. 2-3 seconds) through a proxy function and send AJAX requests to the server at one time. Relatively speaking, the network requests are reduced and the server pressure is reduced.两个不同家族的儿子从小订婚了。一个不想要包办婚姻，一个想把他争取过来！"The waist was bitten off? Is the spine broken?" I asked.随着实力的壮大和身份的变化，不知不觉间韩信多了这么一个习惯。3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.《红罂粟》三部曲，是围绕女声、毒品、腐败三大黑色要素，深入反映贪官背后的权色、权钱、钱色交易的写实性电视剧。《红罂粟III：爱上贪官》是这个系列剧的终结篇。