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The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.In the "DateTime" Groupbox at the top left of the form in Figure 1, the QTimeEdit, QDateEdit, QDateTimeEdit components are used as time, date, and datetime editors; On its right side, a QLineEdit component is placed for string display.I nodded at this passage, Understand that what Zhang Xiaobo said is indeed reasonable, It is not a lie, Here I think it is necessary to give you one thing about popular science. So we have to say something digressive: The result of a real bullet hitting a petrol tank is not the same as that shown in most movies. One shot can explode the petrol tank, But this is not the case, Although a pure metal projectile will rub against the air at a speed of hundreds of meters per second to generate equivalent heat, And will produce sparks after hitting the metal oil drum, But none of this is enough to ignite petrol, Especially for gasoline with a large total amount, to ignite gasoline, please remember one thing-open flame must be used. In addition, gasoline is a flammable item, but it is not an explosive item in the true sense. Only after reaching a certain total amount can explosion be caused. If the total amount is insufficient, it can only cause combustion without explosion.当然。　　同样出生富豪之家的晏薇，有着美艳的脸蛋和性感的身材，自小便是众多男生追逐的目标。她从一进入东林学院开始，就迷恋上了杜谦永。然而杜谦永却并未对她有一丝动心，这让她感到很挫败，她无视青梅竹马的林镜对自己的深厚感情，想尽办法去争取杜谦永的爱。杜谦永因着和林镜的铁哥们儿关系，愈发疏远晏薇。