当它们长期的使用过度或者刺激过高，它们就会被新陈代谢耗尽。
When they're overexposed or stimulated at too high a level for too long a duration, they end up being metabolically exhausted.
相对于长期的使用和应用的灵活性来说，这些项目更看重市场以及费用。
These projects value time to market and cost optimization above the long-term use and flexibility of the application.
对原来使用性能不良的回收系统，长期的使用已起不到回收系统应有的作用，最好能更换掉。
The original use of poor performance recovery system, long-term use has not played the role of the recovery system, it is best to replace.
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