系统状态定义为飞机与雷达的距离，记为 \( r \)。
其服务体系虽成熟但过于标准化，缺乏灵活性，难以快速适应中国客人的个性化需求。
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The other challenge for push-based reactivity is glitches. As I mentioned earlier, glitches are when we can observe two nodes being out of sync with each other. In push-based reactivity, this is very easy to achieve — any code that runs after the first node has been updated, but before the final node has been updated has the opportunity to “see” glitches.
Communication intent