GPS数据更新较慢(1hz到10hz)，并且短时间内存在误差。
GPS has a relatively slow update rate (1 to 10 Hz) and is subject to short term errors.
HIV在人体外是一种非常脆弱的病毒，但是在体外它可以短时间内存活。
HIV is quite weak outside the body but it will remain alive for a limited period of time.
对这种类型的内存泄漏情况，分析短时间内获取的堆转储(heap dump)非常重要，这样可以观察正在快速减少的可用内存。
For this type of memory leak case, it is important to analyze a heap dump taken within the short span of time the free memory is observed to be dropping quickly.
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