在传统模式下，Tomcat 线程池里每个线程都是平台线程。当一个请求进来，Tomcat 分配一个线程执行 LogisticsService.getLogistics()，里面依次执行三个 Thread.sleep 等 IO 操作。
The new MacBook Airs are part of a string of announcements that Apple is making this week in the run-up to a “special experience” event on Wednesday morning. So far, the company has also announced a new iPhone 17e, an updated iPad Air with an M4 chip and additional RAM, new MacBook Pros, and updated Studio Displays.
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