这一经验强调需要保护这些药物的有效性，最大限度地减少耐药的发生和带来的影响。
This experience underscores the need to protect the effectiveness of these drugs by minimizing the occurrence and impact of drug resistance.
从根本上讲，地质学和石油地质学，仍然特别依赖于基于经验的数值判断和对现有资料的有效性评估。
Geology, in general, and petroleum geology, in particular, still rely on value judgements based on experience and an assessment of validity among the data presented.
有时候，生成了案例研究和经验报告，但不一贯地评估关键技术的有效性。
Sometimes case studies and experience reports are produced, but do not consistently assess the usefulness of key techniques.
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