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好了，好了。First of all, the cost of obtaining customers on a large scale remains high. Although parents' awareness of online learning has improved significantly due to the market for online children's English, parents' trust in online learning still needs to be improved.顾涧沉着脸冷笑道：尔等可想过，此举会有什么样的后果？老将军亲自交代的任务，黎章等三人出色完成，若将他交给敌人，往后我们要如何统领大军，又如何服众？众人都沉默。不可与明廷兵刃相向，那么助明廷剿匪呢？这其实并非不可，只是要谈清楚条件，如当年汪直，说清楚海禁问题和我的辖区，谈好了我可以上岸。The scenarios used in the command mode include: sometimes it is necessary to send a request to some objects, but I don't know who the recipient of the request is or what the operation of the request is. At this time, I hope to design the program code in a loosely coupled way; So that the request sender and the request receiver eliminate the coupling relationship in each other's codes.How to improve the classification ability? Apart from practicing and thinking more, I think the core is two points: