产品安全，电磁兼容及气候环境条件的基本知识。
Product Safety and EMC and environment background knowledge.
干湿循环是导致自然气候环境条件中钢筋混凝土结构耐久性劣化最主要的影响因素之一。
Wet-dry cycling condition is one of the most primary factors leading to the durability deterioration of reinforced concrete structures in the natural climate.
如同大多数草药一样，青蒿素的含量和效力取决于气候、地理和环境条件。
As with most medicinal herbs, artemisinin's contents and efficacy are subject to climatic, geographical and environmental conditions.
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