Introduction - If you have any usage issues, please Google them yourself
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Dān shílì lèi de shíxiàn, yīgè lèi zhǐ néng chuàngjiàn yīgè duìxiàng, chuàngjiàn dì èr gè duìxiàng de zhǐzhēn zhǐxiàng de yěshì dì yī gè duìxiàng
“”的用法示例:由 Google 自动翻译英语中文(简体)日语The realization of a single instance of the class, a class can only create an object, create a second object pointer to the first object