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The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.年轻的单身妈妈英迪亚搬进了她的新公寓，当她和她的朋友开始尝试在公寓里发现的占卜板时，她增加了找工作和支付房租的压力。邪恶的力量被释放，神秘的死亡开始发生。他脸色发白，头靠在箱盖上，张大嘴巴呼哧直喘气。尹旭打趣一句，逗得二人皆是大笑。　　该剧共有10集，每周二、周五下午6点在Naver TV、V LIVE、Y outube、Facebook等进行播放。2. Do a good job of understanding before raising. First of all, look for some information on the Internet, study hard, and understand the basic habits of crayfish. Don't just see a few shrimps and listen to others saying that it likes to eat dead chickens and rotten intestines, so it blindly starts.[All-round Introduction to Weightlifting]