当司机加速时，真空不足以运行间歇模式，雨刷将默认为高速。
When the driver accelerated, the vacuum was insufficient to run the intermittent mode and the wipers would default to high speed.
当旅鼠的食物供应不足以维持种群时，一次特别的迁徙就开始了。
When the lemmings' food supply becomes too low to support the population, a singular migration commences.
一般而言，任何时刻前台进程都是为数不多的，只有作为最后的策略——当内存不足以维持它们同时运行时——才会被终止。
Generally, only a few foreground processes exist at any given time. They are killed only as a last resort-if memory is so low that they cannot all continue to run.
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