The first step, is to stop allocating "memory", and start allocating specific somethings else. Consider the usage pattern:
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This is why experts think it may have survived an uncontrolled descent through Earth's atmosphere.
把握“显绩”和“潜绩”，牢牢树立正确政绩观，让发展成果真正惠及亿万农民。
2.2.2 面向对象重构版本（oop_crawler.py）