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The locking problem
，更多细节参见体育直播
Powered by a 10th-gen Intel Core i7 processor (2.3GHz, Turbo Boost up to 3.8GHz), paired with 16GB of RAM and a 512GB SSD, this machine handles demanding multitasking smoothly. It’s well-suited for productivity apps, content creation, coding, and everyday business workflows.
代码重构：它没有直接甩代码，而是先思考了“设计模式”的选择（工厂模式 vs 策略模式），最终选择了适合扩展的策略模式。
其中白色是广角像素、蓝色是窄角像素，转动屏幕，窄角像素就看不见了。